Court Opinion

ID: 7247591
Source: CourtListenerOpinion
Date Created: 2022-07-25 05:30:30.642142+00
Date Added: 2024-06-11T14:04:24.596242
License: Public Domain

LARRY R. HICKS, UNITED STATES DISTRICT JUDGE
Before the court is defendant Schneider Electric IT Corporation's ("Schneider"), formerly known as American Power Conversion Corporation ("APC"), renewed motion for summary judgment on the issue of patent obviousness under 35 U.S.C. § 103. ECF No. 718. Plaintiff Server Technology, Inc. ("STI") filed an opposition to the motion (ECF No. 723) to which Schneider replied (ECF No. 729).
I. Facts and Procedural Background
Plaintiff STI manufactures intelligent electrical power distribution devices. Like STI, defendant Schneider also manufactures intelligent electrical power distribution devices.
In 2006, STI initiated the underlying patent infringement action against Schneider, then known as APC, alleging that certain APC product designs (the AP7900 and AP8900 product lines) infringed several of STI's patents, including United States Patents nos. 7,043,543 ("the '543 patent")1 and 7,702,771 2 ("the '771 patent")
*969. ECF No. 1. STI's patents-in-suit relate to intelligent power distribution units ("PDUs"). PDUs resemble in look and function the electrical plugstrips/power strips ubiquitous in homes and offices that are used to distribute power from a single electrical outlet located in a wall or floor to a multitude of connected electrical appliances (like computers, telephones, printers, televisions, and video game systems). Intelligent PDUs, however, contain "intelligent" design features not present in normal consumer plugstrips. For example, the PDUs at issue in this action contain "switched" outlets, meaning that each outlet or group of outlets on the PDU can be turned on or off remotely over a network. Further, these PDUs continuously monitor electrical information (including voltage, current, and power used by the PDU) and convey this information to the end-user either remotely over a computer network or locally via a display built into the PDU.
The intelligent PDUs designed and manufactured by STI and Schneider/APC are primarily used in large scale applications such as commercial data centers; warehouse-like facilities that maintain and operate networked computer servers.3 Each data center is filled with rows of equipment racks on which networked computer servers are housed. Because the equipment racks are a standard size, data centers profit by maximizing the number of servers that can be powered in each rack: the more servers that can be powered per rack, the more powerful and profitable the data center. Thus, data centers require a constant and reliable power source in order to provide the necessary power for the associated computer servers. Data centers meet these power management needs with intelligent PDUs like those designed by STI and Schneider/APC.
However, a single PDU can only handle a limited number of connected servers/devices before the power draw causes the PDU, and all connected devices, to fail. As with consumer plugstrips, if the devices plugged into an intelligent PDU collectively draw more current/power than the PDU can handle, a current "overload" occurs shutting down every connected device. To warn users of an impending current overload, PDUs have long displayed information about the amount of current being drawn by the PDU. Some early PDUs displayed current information using a single light emitting diode ("LED") that flashed when the PDU was approaching its current threshold. Other PDU designs, including early designs by APC, used an array of colored lights (green, orange, and red) to indicate current level. In contrast, STI's patented designs claimed in Claim 15 of the '543 patent and Claim 15 of the '771 patent are for intelligent PDUs that display current information using a digital display: that is, a display that conveys the amount of current being drawn by the PDU in easily readable numerical digits. See ECF No. 724, Ex. 2 ( '543 patent) at Col. 12:21-50; Ex. 3 ( '771 patent) at Col. 12:19-57.
Between May 12 and May 27, 2015, a jury trial was held on STI's claims that Schneider/APC's challenged product lines infringed Claim 15 of both the '543 and '771 patent. On May 29, 2014, the jury *970returned a verdict in favor of STI finding that the product lines infringed STI's patents. ECF No. 590. In response, Schneider appealed the jury verdict to the Federal Circuit. ECF No. 673. On September 23, 2016, the Federal Circuit held that this court's claim construction of the term "plugstrip" as used in the patents-in-suit was erroneous and issued an order partially reversing the jury verdict and remanding the action to this court.4 See Server Tech., Inc. v. Am. Power Conversion Corp. , 657 Fed.Appx. 1030, 1033-34 (Fed. Cir. 2016). Thereafter, Schneider filed the present renewed motion for summary judgment that Claim 15 of both STI's '543 and '771 patents are invalid as obvious under 35 U.S.C. § 103. ECF No. 718.
II. Legal Standard
Summary judgment is appropriate only when the pleadings, depositions, answers to interrogatories, affidavits, declarations, party stipulations, admissions, and other relevant materials in the record fairly establish that "there is no genuine dispute as to any material fact and the movant is entitled to judgment as a matter of law." FED. R. CIV. P. 56(a). In assessing a motion for summary judgment, the evidence, together with all inferences that can reasonably be drawn therefrom, must be read in the light most favorable to the party opposing the motion. Matsushita Elec. Indus. Co. v. Zenith Radio Corp. , 475 U.S. 574, 587, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986) ; County of Tuolumne v. Sonora Cmty. Hosp. , 236 F.3d 1148, 1154 (9th Cir. 2001).
The moving party bears the initial burden of informing the court of the basis for its motion, along with all evidence showing the absence of any genuine dispute of material fact. Celotex Corp. v. Catrett , 477 U.S. 317, 323, 106 S.Ct. 2548, 91 L.Ed.2d 265 (1986). On those issues for which it bears the burden of proof, the moving party must make a showing that is "sufficient for the court to hold that no reasonable trier of fact could find other than for the moving party." Calderone v. United States , 799 F.2d 254, 259 (6th Cir. 1986) ; see also Idema v. Dreamworks, Inc. , 162 F.Supp.2d 1129, 1141 (C.D. Cal. 2001).
To successfully rebut a motion for summary judgment, the non-moving party must point to facts supported by the record which demonstrate a genuine dispute or issue of material fact. Reese v. Jefferson Sch. Dist. No. 14J , 208 F.3d 736 (9th Cir. 2000). A "material fact" is a fact "that might affect the outcome of the suit under the governing law." Anderson v. Liberty Lobby, Inc. , 477 U.S. 242, 248, 106 S.Ct. 2505, 91 L.Ed.2d 202 (1986). Where reasonable minds could differ on the material facts at issue, summary judgment is not appropriate. See v. Durang , 711 F.2d 141, 143 (9th Cir. 1983). A dispute regarding a material fact is considered genuine "if the evidence is such that a reasonable jury could return a verdict for the nonmoving party." Liberty Lobby , 477 U.S. at 248, 106 S.Ct. 2505. The mere existence of a scintilla of evidence in support of the party's position is insufficient to establish a genuine dispute; there must be evidence on which a jury could reasonably find for the party. See Id. at 252, 106 S.Ct. 2505.
III. Discussion
In its renewed motion for summary judgment, Schneider seeks an order from the court that asserted Claim 15 of the '543 patent and asserted Claim 15 of the '771 patent are invalid as obvious under 35 U.S.C. § 103. ECF No. 718. As addressed below, the court agrees and finds that both Claim 15 of the '543 patent *971and Claim 15 of the '771 patent are invalid as obvious under Section 103 because a person of ordinary skill in the art would have had a reason to combine the identified prior art to arrive at STI's patented PDU design in order to alleviate known problems in the art including alerting an end-user to a possible current overload condition.
A. Obviousness Standard
An issued patent is presumed valid by statute. 35 U.S.C. § 282. However, a patent may be held invalid as a matter of law if it is obvious in light of the prior art. 35 U.S.C. § 103. Specifically, under Section 103 of the Patent Act, a patent may be deemed invalid "if the differences between the subject matter sought to be patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains." 35 U.S.C. § 103(a). Put more simply, a patented invention is obvious if a person of ordinary skill in the art would have had a reason to combine the particular elements or technologies already known in the art in the way or manner the claimed invention does. KSR Int'l Co. v. Teleflex Inc. , 550 U.S. 398, 418, 127 S.Ct. 1727, 167 L.Ed.2d 705 (2007).
Although the ultimate determination of obviousness under Section 103 is a question of law, it is based on several underlying factual findings, including: (1) the scope of the claimed invention; (2) the level of ordinary skill in the pertinent art; (3) the scope and content of the prior art; (4) the differences between the claimed invention and the prior art; (5) the existence of a reason to combine the prior art references; and (6) evidence of secondary considerations such as commercial success, long-felt need, and copying by others. Graham v. John Deere Co. , 383 U.S. 1, 17-18, 86 S.Ct. 684, 15 L.Ed.2d 545 (1966) ; In re Kubin , 561 F.3d 1351, 1355 (Fed. Cir. 2009). A defendant proffering the affirmative defense of obviousness under Section 103 bears the burden to prove that the patented claim is obvious by clear and convincing evidence. Eli Lilly & Co. v. Barr Labs., Inc. , 251 F.3d 955, 962 (Fed. Cir. 2001) ; Finnigan Corp. v. Int'l Trade Comm'n , 180 F.3d 1354, 1365 (Fed. Cir. 1999). For purposes of summary judgment, the evidence, when viewed in the light most favorable to the non-moving party, must support particular findings "as to the reason the skilled artisan, with no knowledge of the claimed invention, would have selected [the identified prior art] for combination in the manner claimed [in the patented design]." In re Kotzab , 217 F.3d 1365, 1371 (Fed. Cir. 2000).
B. Claim Language
Independent Claim 15 of the '543 patent discloses:
An electrical power distribution plugstrip connectable to one or more electrical loads in a vertical electrical equipment rack, the electrical power distribution plugstrip comprising in combination:
A. a vertical strip enclosure having a thickness, and a length longer than a width of the enclosure;
B. a power input penetrating said vertical strip enclosure;
C. a plurality of power outputs disposed along an area on a face of said length of the strip enclosure, each among the plurality of power outputs being connectable to a corresponding one of said one or more electrical loads;
D. a plurality of power control relays disposed in said vertical strip enclosure, each among said plurality of power control relays being connected to said power input and to one or more corresponding *972power outputs among said plurality of power outputs;
E. a digital current information display disposed on another area of said vertical strip enclosure and adjacent to said plurality of outputs in current-determining communication with at least one among said power input and said power outputs; and
F. a plugstrip current reporting system (i) associated with the vertical strip enclosure (ii) in power information determining communication with at least one among said power input and said plurality of power outputs, and (iii) communicatingly connectable with a distal current reporting system through a communications network external to the electrical power distribution plugstrip.
ECF No. 724, Ex. 2 ( '543 patent) at Col. 12:21-50.
The plain language of Claim 15 discloses a design for a power distribution plugstrip with the following claimed features: (a) a vertical strip enclosure, meaning that the PDU is oriented vertically in an equipment rack rather than horizontally; (b) a power input, meaning that there is a power cord that runs power from an outlet into the plugstrip housing which is then distributed to the various outlets on the plugstrip; (c) a number of power outlets (i.e. more than one) that electrical appliances like computer servers can be plugged into; (d) remotely controllable relays associated with the power outlets, meaning that there is a way to remotely switch on or off an individual outlet, or a group of outlets, through the use of a computer (or other) network; (e) a digital current-related display, meaning a digital display built into the plugstrip housing that displays, in numerical digits, the level of real-time current being drawn by the PDU; and (f) a current reporting system, meaning a system which allows the plugstrip to report electrical information to a user remotely through a computer (or other) network. Id. The parties do not contest the scope of Claim 15 of the '543 patent or the specific limitations identified in the claimed PDU design. See ECF Nos. 718, 723. As such, in order for Claim 15 of the '543 patent to be obvious under Section 103, Schneider's identified prior art references must collectively disclose or claim all of the design features identified in Claim 15 above (claim limitations (a) through (f) ). See KSR , 550 U.S. at 418-19, 127 S.Ct. 1727.
Claim 15 of the '771 patent is virtually identical to Claim 15 of the '543 patent except that Claim 15 of the '771 patent is broader in scope because it is not limited to a "vertical" device. ECF No. 724, Ex. 3 ( '771 patent) at Col. 12:19-57. Because Claim 15 of the '771 patent is broader than Claim 15 of the '543 patent, a finding that Claim 15 of the '543 patent is, or is not, obvious necessarily means that Claim 15 of the '771 patent is likewise obvious or not obvious. Thus, for purposes of this motion, the court analyzes Schneider's obviousness challenge with respect to Claim 15 of the '543 patent only.
C. Person of Ordinary Skill in the Art
A person of ordinary skill in the art is a person presumed to think "along the line of conventional wisdom in the art and is not one who undertakes to innovate, whether by patient, and often expensive, systematic research or by extraordinary insights." Standard Oil Co. v. Am. Cyanamid Co. , 774 F.2d 448, 454 (Fed. Cir. 1985). For purposes of this motion, the parties agree that a person of ordinary skill in the art is one who would have an electrical or computer engineering degree (or the equivalent industry experience) and at least one to three years of experience designing power distribution devices.
*973D. Identified Prior Art
In its motion, Schneider identifies four pieces of prior art that it argues were in existence prior to the filing of STI's '543 patent and which, when combined, establish that STI's patents-in-suits are invalid as obvious: (1) the MasterSwitch VM ("MSVM"), a PDU manufactured by APC; (2) United States Patent no. 5,650,771 ("the Lee patent") ; (3) United States Patent no. 6,476,729 ("the Liu patent") ; and (4) United States Patent no. 6,086,397 ("the Chapman patent"). See ECF No. 718. The court shall address the disclosures, design features, and teachings of each prior art reference below.
1. MSVM5
The MSVM, a PDU designed and manufactured by APC, was first advertised and sold in 1999. As such, its design pre-dates the August 15, 2001 filing date of the '543 patent application by two years.
Like STI's claimed invention, the MSVM was a vertical, switched PDU with remote current reporting capabilities. In particular, the MSVM design specifications classify it as a "vertically-mounted, stand-alone, network-manageable power distribution unit (PDU) designed to accommodate a total of 16 outlets." ECF No. 718, Ex. 4 (Installation and Quick Start Manual), at 6. Eight of the outlets on the PDU were individually-managed or "switched" outlets, while eight outlets were always "on." Id. Further, the MSVM allowed for remote managing of its switched outlets through a network interface and contained both a current sensing component and a current reporting system. See ECF No. 718, Ex. 3 (User Guide) at 17 ("Current Sensing-Each MasterSwitch VM unit is equipped with a current sensor that measures the total current being used by devices connected to the unit."); at 18 ("Using a Web browser or Telnet, you can remotely manage MasterSwitch VM and its outlet properties."). The MSVM also had a "current information display" located directly on the PDU which was in direct communication with the current sensor so that the amount of current being drawn by the MSVM at any one time was communicated to the display. Id. at 16. But unlike claim limitation (e) of Claim 15 of the '543 patent, the MSVM's "current information display" was not a numerical digital display. Instead, the MSVM display conveyed current information via a series of colored LEDs: solid green, flashing green, or red depending on the amount of current being drawn by the MSVM at the time.6 Id.
Based on these specifically disclosed and claimed design features, the court finds, and STI concedes in its opposition, that the MSVM discloses all design elements claimed and identified in Claim 15 of the '543 patent except for the "digital" display claimed in limitation (e). All other claimed design features, including (a) a vertical strip enclosure which contains (b) a power input, (c) a number of power outlets which are (d) remotely controllable through relays, and (f) a current reporting system, are present in the MSVM. Further, as addressed above, the MSVM even contains a "current-related display" to *974alert an end-user to the possibility of an overload condition although it is undisputed that the MSVM's "current-related display" is not a digital display capable of showing numerical digits. Thus, the sole difference between the MSVM and Claim 15 of the '543 patent, for the purpose of the court's obviousness inquiry, is the digital display of claim limitation (e).
2. The Lee Patent7
The Lee patent, entitled "Electrical Socket with Monitoring Unit for Monitoring Operating Conditions," was filed on April 25, 1995, more than six years before the '543 patent. See ECF No. 718, Ex. 6. The Lee patent, which relates to an "electrical socket with a monitoring unit," discloses both a monitoring unit (which monitors operating conditions of the electrical socket such as voltage, line current, and power) and a display unit (which displays socket operating conditions to a user) within an electrical socket housing. Id. at Col. 1:12-13. Much like the monitoring unit disclosed in STI's '543 patent, the monitoring unit disclosed in the Lee patent monitors and determines the operating conditions of the electrical outlet including line current. Id. at Col. 1:53-59 ("The operating conditions monitored by the monitoring unit include the ambient temperature, the line voltage and the line current."). Further, the display unit claimed in the Lee patent is a digital display capable of showing the actual value of the various operating parameters of the electrical socket/outlet through the use of a built-in liquid crystal display ("LCD"). Id. at Col. 3:45-49 ("The display unit 26 , which is preferably a liquid crystal display (LCD), is connected electrically to the central processing unit ... so as to show the value of the line voltage, the line current, the ambient temperature or the line power thereon.") (emphasis added). Based on these patent disclosures, the court finds that the Lee patent claims a digital display capable of showing the numerical value of line current designed for use in an electrical outlet housing.
3. The Liu Patent8
The Liu patent, entitled "Power Monitoring Module with Display Unit for Electrical Power Source Device," was filed on August 22, 2000, almost a full year before the filing of the '543 patent. Like the Lee patent, the Liu patent relates to "an electrical power monitoring module with a display unit capable of displaying various electrical parameters." ECF No. 718, Ex. 7 at Col. 1:10-12. And also like the Lee patent, the Liu patent specifically claims both a monitoring unit and a digital display unit capable of showing the numerical value of various electrical parameters detected by the unit. Id. at Col. 1:43-46 ("The power monitoring module is capable of detecting various electrical parameters of the electric appliances plugged on the power source device and the power source."); at Col. 1:47-53 ("The other object of the present invention is to provide a power monitoring module with a display unit capable of displaying relevant electrical parameters of the power source device and the electrical appliances plugged on the power source device. The electrical parameters include voltage value, current value , watt, kilowatt-hour, apparent power value, power factor, frequency, and so on.") (emphasis added). Thus, similar to the Lee patent, the Liu patent determines, monitors, and displays the same electrical operating conditions as the claimed PDU in the '543 patent. However, the digital display unit claimed in the Liu patent is *975not limited to the Lee patent's LCD display. Instead, the Liu patent claims both an LCD digital display and an LED digital display so the Liu patent's claimed design is broader in scope and application than the design in Lee. Id. at Col. 2:56-59 ("The display unit includes an insulated layer 22 , a light emitting device 23 , a LCD or LED indicating unit 24 , and a conductive cable 25 , capable of displaying various electrical parameters of the power source device.") (emphasis added). Further, the Liu patent specifically claims a modular display unit capable of being fitted into other electrical power distribution devices like a power strip. Id. at Col. 1:40-43 ("[I]t is a primary object of the present invention to provide a power monitoring module for an electrical power source device, such as an electrical power strip[.]"). Based on these specific patent disclosures, the court finds that the Liu patent claims a modular digital display unit capable of displaying the numerical value of current being drawn by a power distribution device.
4. The Chapman Patent9
The Chapman patent, entitled "High Reliability Raised Floor Power Strip," was filed on April 27, 1998, a full three years before the '543 patent. The Chapman patent relates to a power strip that has both a "permanently attached current sensor" and a "surface mounted liquid crystal display" with a number of electrical outlets. ECF No. 718, Ex. 8 at Col. 6:57-60. Although the power strip claimed in the Chapman patent is not as technically advanced and does not claim as many design features as the plugstrip claimed in Claim 15 of STI's '543 patent, the LCD claimed in the Chapman patent is designed to display "the current passing through the power strip" which "may be readily and continuously monitored without utilizing any special tools." Id. at Col. 6:60-63. Moreover, the Chapman patent specifically claims a digital display capable of showing "real-time current monitoring." Id. at Col. 6:64-65. Based on these specific disclosures, the court finds that the Chapman patent claims a digital display capable of showing the numerical value of current running through a power strip.
E. Combination of the Prior Art
In order for a patented design to be obvious as a matter of law, the combination of the identified prior art references must include all the claimed design features and limitations of the patented design. See KSR , 550 U.S. at 418-19, 127 S.Ct. 1727. If a single limitation is not met by the combination of prior art, then the patented design is not obvious. Id.
As addressed above, the court has found that the MSVM contains all claimed features and limitations of Claim 15 of the '543 patent except for the "digital display" claimed in limitation (e). See Supra Section III(D)(1). Thus, for the court to find as a matter of law that Claim 15 of the '543 patent is obvious under Section 103, the disclosure of a digital display capable of displaying the numerical value of real-time current in a plugstrip must be found in at least one of either the Lee, Liu, or Chapman patents. Reviewing these three prior art references, the court finds that all three disclose and claim the use of a "digital display" to show the value of real-time current passing through a power distribution device (either a single outlet or a power strip) as claimed in limitation (e) of Claim 15 of the '543 patent. See Supra Sections III(D)(2)-(4). Therefore, the court finds that combining the identified prior art references reaches the entirety *976of the design claimed in Claim 15 of the '543 patent.
In opposition STI contends that although the Lee, Liu, and Chapman patents claim digital displays for displaying the value of current running through an electrical outlet or power strip, these three prior art references are outside the field of endeavor of the '543 patent, and thus, cannot be used to invalidate the '543 patent. See ECF No. 723. Specifically, STI argues that the Lee, Liu, and Chapman patents relate to the field of consumer power distribution devices for ordinary users and "electrical hobbyists," rather than the technologically advanced field of intelligent commercial power distribution devices contemplated by the '543 patent. Therefore, STI argues that these three patents fall outside the relevant field of endeavor for the '543 patent. The court disagrees.
A prior art reference may be used to invalidate a patent as part of an obviousness combination if (1) it is from the "same field of endeavor" as the patent-in-suit, or (2) "if the reference is not within the field of the inventor's endeavor, ... the reference ... is reasonably pertinent to the particular problem with which the inventor is involved." Unwired Planet, LLC v. Google Inc. , 841 F.3d 995, 1000 (Fed. Cir. 2016) (citing In re Clay , 966 F.2d 656, 658-59 (Fed. Cir. 1992) ). "The field of endeavor of a patent is not limited to the specific point of novelty, the narrowest possible conception of the field, or the particular focus within a given field." Id. at 1001. Further, guidance by the Supreme Court in KSR directs a court to "construe the scope of analogous art broadly, stating that 'familiar items may have obvious uses beyond their primary purposes, and a person of ordinary skill often will be able to fit the teachings of multiple patents together like pieces of a puzzle.' " Wyers v. Master Lock Co. , 616 F.3d 1231, 1238 (Fed. Cir. 2010) (quoting KSR , 550 U.S. at 402, 127 S.Ct. 1727 ). Thus, in determining whether a prior art reference is within the same field of endeavor, a court broadly construes the appropriate field and is not limited solely to the particular field in which the inventor is involved or the field specifically claimed in the patent-in-suit. Unwired Planet , 841 F.3d at 1000.
The court has reviewed the documents and pleadings on file in this manner and finds that the appropriate field of endeavor for the '543 patent is the field of endeavor related to general electrical power distribution devices rather than STI's more narrow field of "intelligent commercial PDUs." The court's broad construction of the relevant field of endeavor is consistent with the plain language of STI's patents-in-suit. For example, the '543 patent specifically states that the field of the invention "relates generally to remote power management systems, and more particularly to electrical power distribution devices." ECF No. 724, Ex. 2 at Col. 1:14-18. Similarly, the field of invention identified in the '771 patent is the technological field which "relates generally to power management systems and, more particularly, to electrical power distribution devices and methods." ECF No. 724, Ex. 3 at Col. 1:33-36. Further, there is no language in either of STI's patents-in-suit to support STI's narrow field of endeavor and STI has not presented any evidence which would support such a narrow construction. Thus, construing the field of endeavor broadly as required under KSR and consistent with STI's own language identifying the field of invention for the patents-in-suit, the court finds that the field of endeavor covered by STI's patents-in-suit is a field of endeavor related to electrical power distribution devices for power management systems.
This field of endeavor clearly includes the Lee, Liu, and Chapman patents. The *977Lee patent's design is "an electrical socket for connecting electrically an electrical appliance to a line power source, more particularly to an electrical socket with a monitoring unit for monitoring operating conditions of the electrical socket." ECF No. 718, Ex. 6 at Col. 1:7-13. Similarly, the Liu patent specifically "relates to a power monitoring module for a power source device, and more particularly to an electrical power monitoring module with a display unit capable of displaying various, electrical parameters of an electric appliance plugged on the power source device." ECF No. 718, Ex. 7 at Col. 1:6-12. Finally, the Chapman patent discloses "a power strip specifically designed for the mass computer work station environment, but adaptable for other uses including telecommunications equipment racks, electronic equipment racks, and any situation wherein multiple electronic devices may be connected to a common electrical circuit." ECF No. 718, Ex. 8 at Col. 4:31-37. By their plain language, these patents all relate to designs for a digital display used on an electrical power distribution device in order to show the value of real-time current running through that device. Therefore, the court finds that the Lee, Liu, and Chapman patents fall within the relevant field of endeavor of the '543 patent.
Additionally, even if the prior art digital displays of the Lee, Liu, and Chapman patents were not within the same field of endeavor as the '543 patent, these patents are nonetheless "reasonably pertinent" to the problem that the STI inventors were trying to solve with the claimed digital display-that of providing real-time numerical current information to an end-user to help prevent a current overload condition-and thus, are relevant to the court's obviousness inquiry. See Wyers , 616 F.3d at 1238. As identified in STI's patents-in-suit, one of the issues that the inventors were trying to solve with the addition of a digital display was to provide real-time current information to an end-user to alleviate current-related problems in the PDU. See, e.g. , ECF No. 724, Ex. 2 ( '543 patent) at Col. 3:16-22 ("The total input current display 104 can be used to advantage by a technician when installing or troubleshooting a RETMA equipment rack by watching how much current change is observed when each network appliance is plugged in and turned on. Unusually high or low currents can indicate particular kinds of faults to experience technicians."). Here, all three patents sought to overcome similar issues related to providing end-users with real-time current information so as to alert an end-user to possible current-related problems in the electrical device. See ECF No. 718, Ex. 6 ("the Lee patent") at Col. 1:42-47 ("Therefore, the object of the present invention is to provide an electrical socket with a monitoring unit that is capable of monitoring operating conditions of the electrical socket and that can be used to alert the user in the event that a preset overload condition has been detected to help avert actual occurrence of an overload."); Ex. 7 ("the Liu patent") at Col. 1:34-38 ("Thus, it is desirable to provide an improved power source device with a display unit which is capable of indicating various electrical parameters of both the electric appliance electrically connected to the power source device and the power source."); Ex. 8 ("the Chapman patent") at Col. 4:7-10 ("Another problem frequently encountered when power strips are utilized in computer workstation environments, is the overloading of the circuit due to additional equipment being plugged into the power strip."). Thus, the court finds that these patents are also "reasonably pertinent" to one of the problems that STI's inventors sought to solve with the use of a digital display. Therefore, these three patents fall within the field of endeavor of STI's patents-in-suit and are appropriately *978considered in Schneider's obviousness challenge.
F. Reason to Combine
As the court has found that STI's '543 patent is met by a combination of design elements already known in the prior art, the court's inquiry now turns to whether there was an identifiable reason to combine these various design elements to reach the patented design. This is because the mere fact that prior art references could be combined to reach the patented design does not automatically render the resultant combination obvious. In re Mills , 916 F.2d 680, 682 (Fed. Cir. 1990). Rather, there must have existed a reason to combine the prior art references in such a manner as to reach the patented design at the time of the invention. Id. Thus, the court must determine whether there was a motivation or apparent reason for a person of ordinary skill in the art in 2001 to combine a digital display like those disclosed in the Lee, Liu, and Chapman patents with a vertical, switched PDU like the MSVM, and thereby reach the design claimed in Claim 15 of the '543 patent. See Soft Gel Techs., Inc. v. Jarrow Formulas, Inc. , 864 F.3d 1334, 1340 (Fed. Cir. 2017) ("An obviousness determination also requires a person of skill in the art at the time of the invention to have had 'an apparent reason to combine the known elements in the fashion claimed by the patent at issue.' "); see also Wyers , 616 F.3d at 1238 ("The second question for our consideration is whether there was a motivation to combine the sleeve with the prior art barbell locks[.]").
This "reason to combine" can be shown by identifying some teaching, suggestion, or motivation in the prior art to combine or modify the art in the manner identified in the patent claims. KSR , 550 U.S. at 418-19, 127 S.Ct. 1727 ; see also Ruiz v. A.B. Chance Co. , 234 F.3d 654, 665 (Fed. Cir. 2000) (stating that the court should look to the prior art references themselves to see if the references provide a "reason, suggestion, or motivation to combine" the relevant design features to solve a particular problem known in the art). Where a prior art reference presents an express suggestion to combine the reference in a particular way or with another design, or teaches the use of the design in a way similar to that of the patented design, then there exists an apparent motivation for a person of ordinary skill in the art. In re Kotzab , 217 F.3d at 1370. In such a case, a patentee like STI cannot defeat summary judgment by quibbling over the reason that the prior art reference discloses such a suggestion. Further, an explicit suggestion to combine elements from the prior art establishes a reason to combine, even if there is evidence teaching away from that combination. Enova Tech. Corp. v. Seagate Tech. (US) Holdings Inc. , 706 Fed.Appx. 987, 993 (Fed. Cir. 2017) ("[W]e have held that disclosures in a reference that might be read to teach away from combining two references did not overcome 'the express teachings' of the reference suggesting combinability."). In contrast, an invention will not be held obvious "where vague prior art does not guide an inventor toward a particular solution" for a known problem. Bayer Schering Pharma AG v. Barr Labs., Inc. , 575 F.3d 1341, 1347 (Fed. Cir. 2009).
Since the Supreme Court's decision in KSR , a district court conducting an obviousness inquiry is instructed to "take a more 'expansive and flexible approach' in determining whether a patented invention was obvious at the time it was made." Wyers , 616 F.3d at 1238 (quoting KSR , 550 U.S. at 415, 127 S.Ct. 1727 ). In particular, the Supreme Court has emphasized the role of the court's "common sense" in determining whether a patent is obvious as "[r]igid preventative rules that deny factfinders *979recourse to common sense ... are neither necessary under our case law nor consistent with it." KSR , 550 U.S. at 421, 127 S.Ct. 1727 ; see also Perfect Web Techs., Inc. , 587 F.3d at 1330 ("in appropriate cases, the ultimate inference as to the existence of a motivation to combine references may boil down to a question of "common sense[.]"); Wyers , 616 F.3d at 1239 ("[T]he legal determination of obviousness may include recourse to logic, judgment, and common sense, in lieu of expert testimony."). The question of whether there was a motivation to combine identified prior art references is appropriately addressed on summary judgment. See KSR , 550 U.S. at 427, 127 S.Ct. 1727 ; see also Perfect Web Techs., Inc. v. InfoUSA, Inc. , 587 F.3d 1324, 1330 (Fed. Cir. 2009) (stating that the determination of whether there is a motivation to combine is "appropriate for resolution on summary judgment.").
In its motion, Schneider argues that a person of ordinary skill in the art back in 2001 would have had a reason to combine the digital displays claimed in the Lee, Liu, and Chapman patents with a switched, vertical PDU like the MSVM in order to solve the known problem of alerting an end-user to a possible current overload condition in the PDU. See ECF No. 718. As addressed below, the court agrees.
Initially, the court notes that both parties agree that during the relevant time period, those skilled in the art were well aware of the problem of current overloads in PDUs. In fact, it is undisputed that alerting an end-user that they were close to, or had triggered, an overload condition on the PDU was of critical importance to both PDU designers and end-users. Thus, the court must determine whether a digital display was a known solution to the current overload problem. Reviewing the disclosures and claims of the Lee, Liu, and Chapman patents, the court finds that all three digital display prior art references specifically teach the use of a digital display capable of displaying real-time current value in order to alert an end-user to a possible current overload condition in a power distribution device. For example, both the Lee and Chapman patents recognize that current overloads were a known problem in power distribution devices prior to 2001. See ECF No. 718, Ex. 6 at Col. 1:28-38 ("Short circuiting also arises when electrical cables are used improperly, i.e. overloading. Electrical cables are designed to bear a maximum operating voltage and a maximum operating current. However, in actual use, overloading happens when current passing through the electrical cables exceeds the specified maximum value due to the use of electrical extensions for connecting a plurality of electrical appliances to a single electrical socket. Overloading damages the fuses which are installed in the electrical appliances and causes overheating and short circuiting of the electrical cables."); Ex. 8 at Col. 4:7-10 ("Another problem frequently encountered when power strips are utilized in computer workstation environments, is the overloading of the circuit due to additional equipment being plugged into the power strip."). In order to address this current overload problem, both the Lee and Chapman patents teach the use of a digital display to alert the end-user that they were close to causing, or had caused, a current overload. Id. , Ex. 6 at Col. 4:53-59 ("the electrical socket of the present invention incorporates a monitoring unit that is capable of alerting the user in the event that a preset overload condition has been detected to help avert actual occurrence of an overload."); Ex. 8 at Col. 4:22-25 ("it can be appreciated that there exists a need for a power strip which allows for the easy determination, at the power strip itself, of the current being drawn by the attached equipment"). The court finds that these *980disclosures provide an ordinary person in the art a reason to use a digital display in a PDU to address a known problem in the art.
Similarly, the digital display disclosed in the Liu patent specifically teaches a person to use the modular digital display in an electrical power distribution device like a power strip or PDU. ECF No. 718, Ex. 7 at Col. 1:40-43 ("it is a primary object of the present invention to provide a power monitoring module for an electrical power source device, such as an electrical power strip or an un-interrupted power supply"). Thus, Liu specifically discloses a direct suggestion to an ordinary person in the art to combine its modular digital display capable of displaying real-time current value into an electric power strip or PDU like the MSVM in order to alert end-users of a pending current overload condition. An express suggestion to combine in a prior art reference is sufficient motivation for an ordinary person skilled in the art to follow the suggested combination and reach a patented design. See In re Kotzab , 217 F.3d at 1370. Therefore, the court finds that all three patents provide an apparent reason and motivation to combine a digital display with a PDU and reach STI's patented design. Accordingly, Claim 15 of STI's '543 patent is obvious under Section 103 as a matter of law.
In its opposition, STI contends that an ordinary person in the art would not have had any identifiable reason to use a digital display to address the "current overload problem" in lieu of other design options, like blinking, colored LEDs. See ECF No. 723. STI contends that prior-art PDUs from the relevant time frame already reflected industry concerns about current overloads by including design features to address this problem, namely, audible and visual alarms to alert an on-site technician to an overload condition. For example, APC's MSVM had a single-LED indicator that could turn different colors and alert an end-user of a current overload condition. Further, STI argues that the evidence in this action establishes that during the relevant time period, ordinary electrical engineers and PDU designers, including those at APC, felt that an LED worked appropriately for alerting an end-user to a current overload condition. Similarly, STI contends that other PDU designers were moving away from providing detailed information on the PDU itself, instead relying on information conveyed remotely over a network. Finally, STI argues, and APC concedes, that a digital display was costlier to add to a PDU than an LED display and provided more unique design challenges to fit on a PDU than an LED. Thus, STI contends that the evidence establishes that there were no design incentives for an ordinary person in the art to incorporate a digital display into a PDU to address the current overload problem and, as such, its patented design is not obvious.
Initially, the court notes that STI's evidence for why a person of ordinary skill in the art would not use a digital display over an LED, does not overcome the explicit suggestions in the Lee, Liu, and Chapman patents to combine a digital display with an electronic power distribution device like a power strip in order to alert an end-user to a current overload condition. See, e.g., Enova Tech. Corp. , 706 Fed.Appx. at 993 (holding that evidence that explains a reason for not combining two prior art references cannot overcome "the express teaching" of the references). Second, the fact that STI's competitors felt that the combination of a digital display with a PDU would not be economically viable at the time is irrelevant to the court's obviousness inquiry. See, e.g., Orthopedic Equipment Co., Inc. v. United States , 702 F.2d 1005, 1013 (Fed. Cir. 1983) ("[T]he fact *981that the two disclosed apparatus would not be combined by businessmen for economic reasons is not the same as saying that it could not be done because skilled persons in the art felt that there was some technological incompatibility that prevented their combination. Only the latter fact is telling on the issue of nonobviousness."). Contrary to STI's argument, the issue before the court is not whether a digital display was the preferred way to address the "current overload problem" in a PDU. Rather, the issue is whether one skilled in the art would have had any reason to use a digital display to alert an end-user to a current overload condition. See KSR , 550 U.S. at 420, 127 S.Ct. 1727 (holding that "any need or problem known in the field of endeavor at the time of invention and addressed by the patent can provide a reason for combining the elements in the manner claimed.") (emphasis added); see also In re Kotzab , 217 F.3d 1365, 1370 (Fed. Cir. 2000) (holding that for a patent to be obvious, "there must be some motivation, suggestion or teaching of the desirability of making the specific combination that was made by the applicant."). And here, based on the express teachings in the Lee, Liu, and Chapman patents, the court finds that it would have been obvious to combine a digital display designed for a power distribution device with a PDU like the MSVM in order to solve what the parties recognize and concede was a well-known problem in the art at the time.
STI also raises an argument that because the current overload problem was not the specific problem the inventors of the '543 patent were trying to solve with the inclusion of the digital display, Claim 15 of the '543 patent is not obvious. Rather, STI contends that its inventors were trying to solve a different problem with the use of a digital display, that of rack maximization. However, STI's argument is without merit. "[N]either the particular motivation nor the avowed purpose of the patentee controls. What matters is the objective reach of the claim. If the claim extends to what is obvious, it is invalid." KSR , 550 U.S. at 419, 127 S.Ct. 1727. Thus, STI's subjective motivation for combining the digital display has no bearing on the court's analysis. Further, any problem in the art is sufficient for the court to find that the patent is obvious in light of the prior art and not just the problem identified by the patentee. KSR , 550 U.S. at 420, 127 S.Ct. 1727 (holding that "any need or problem known in the field of endeavor at the time of invention and addressed by the patent can provide a reason for combining the elements in the manner claimed.") (emphasis added). Finally, nothing in STI's patents supports its argument that the digital display solved the rack maximization problem it now identifies. Instead, the patents link the use of a digital display to the current overload problem discussed in depth in the parties' briefs. See, e.g. , ECF No. 724, Ex. 2 ( '543 patent) at Col. 3:16-22 ("The total input current display 104 can be used to advantage by a technician when installing or troubleshooting a RETMA equipment rack by watching how much current change is observed when each network appliance is plugged in and turned on. Unusually high or low currents can indicate particular kinds of faults to experience technicians."). Therefore, STI's argument is insufficient to overcome the court's finding that Claim 15 of the '543 patent, and thereby Claim 15 of the '771 patent, are obvious as a matter of law.
G. Secondary Considerations of Non-Obviousness
Before a court can make an ultimate finding that a patented claim is invalid as obvious under Section 103, a court must determine whether there are any "secondary considerations" which support a finding that an otherwise obvious design should be found nonobvious.
*982KSR , 550 U.S. at 405, 127 S.Ct. 1727. This is because "[s]econdary considerations 'may often establish that an invention appearing to have been obvious in light of the prior art was not.' " Crocs, Inc. v. ITC , 598 F.3d 1294, 1310 (Fed. Cir. 2010) (quoting Stratoflex, Inc. v. Areoquip Corp. , 713 F.2d 1530, 1538 (Fed. Cir. 1983) ). Secondary considerations relevant to an obviousness determination include, but are not limited to (1) the commercial success of the patented designs; (2) copying the patented design by others; and (3) the patented design meets a long felt, but unsolved need. See, e.g., KSR , 550 U.S. at 405, 127 S.Ct. 1727 (commercial success and long felt need); Akamai Techs., Inc. v. Cable & Wireless Servs., Inc. , 344 F.3d 1186, 1196 (Fed. Cir. 2003) (copying); Transocean Offshore Deepwater Drilling, Inc. v. Maersk Contractors USA, Inc. , 617 F.3d 1296, 1304-05 (Fed. Cir. 2010) (affirming non-obviousness based on commercial success, copying by others).
In its opposition, STI argues that substantial evidence of secondary considerations establishes that adding a digital display to a vertical plugstrip was not obvious. See ECF No. 723. In particular, STI focuses on (1) the commercial success of its digital display PDUs; (2) subsequent copying of the digital display design by others, including APC; and (3) a long felt, but unsolved need of knowing the exact measured current value being drawn by the PDU to help maximize rack space.
The court has reviewed STI's evidence of secondary considerations and finds the evidence is insufficient to overcome the court's strong finding of obviousness as a matter of law. See Wyers , 616 F.3d at 1246 ("[W]here the inventions represent[t] no more than the predictable use of prior art elements according to their established functions, the secondary considerations are inadequate to establish nonobviousness as a matter of law."); see also Leapfrog Enters., Inc. v. Fisher-Price, Inc. , 485 F.3d 1157, 1162 (Fed.Cir.2007) (holding that objective considerations of nonobviousness, including substantial evidence of commercial success, praise, and long-felt need, were inadequate to overcome a strong showing the claims at issue were invalid); DyStar Textilfarben GmbH & Co. Deutschland KG v. C.H. Patrick Co. , 464 F.3d 1356, 1371 (Fed.Cir.2006) ("The presence of certain secondary considerations of nonobviousness are insufficient as a matter of law to overcome our conclusion that the evidence only supports a legal conclusion that claim 1 would have been obvious."); Intercontinental Great Brands LLC v. Kellogg North Am. Co. , 869 F.3d 1336, 1353-60 (Fed. Cir. 2017) (affirming summary judgment finding of obviousness despite "substantial" and "strong" evidence of secondary considerations). The evidence presented by STI on the various secondary considerations is simply insufficient to overcome the direct teachings of the prior art references and Schneider's clear and convincing evidence that Claim 15 of the '543 and '771 patents are obvious. Further, STI has failed to establish the requisite nexus that secondary considerations, including the commercial success of its products, were solely due to the "digital" display aspect of the patented design and not some other design feature or external factor. See Wyers , 616 F.3d at 1239 ("Our case law clearly establishes that the patentee must establish a nexus between the evidence of commercial success and the patented invention."); In re Huang , 100 F.3d 135, 140 (Fed.Cir.1996) (patentee must show that "the sales were a direct result of the unique characteristics of the claimed invention."). Moreover, STI's proffered secondary considerations fail to show that STI's patented designs are nothing more than the predictable combination of prior art. Therefore, the court finds that STI's evidence of secondary considerations *983is insufficient to overcome the court's findings that Claim 15 of the '543 and Claim 15 of the '771 patent are obvious under 35 U.S.C. § 103 as a matter of law.
IT IS THEREFORE ORDERED that defendant's renewed motion for summary judgment (ECF No. 718) is GRANTED. Claim 15 of the '543 patent and Claim 15 of the '771 patent are invalid as obvious.
IT IS FURTHER ORDERED that the clerk of court shall enter judgment in favor of defendant Schneider Electric IT Corporation, formerly known as American Power Conversion Corporation, and against plaintiff Server Technology, Inc., on plaintiff's claim for patent infringement that defendant infringed Claim 15 of the '543 patent and Claim 15 of the '771 patent.
IT IS FURTHER ORDERED that the parties shall have twenty (20) days after entry of this order to submit a joint status report outlining any remaining issues for the court.
IT IS SO ORDERED.

A copy of the '543 patent is attached as Exhibit 2 to the declaration of James Hartley filed in support of STI's opposition to the present motion. ECF No. 724, Ex. 2.

Networked computer servers housed in large commercial data centers form the backbone of key software and computer systems including data storage systems (like Apple iCloud, Microsoft OneNote, and Dropbox); telecommunication systems; industrial and commercial databases and inventory systems; and websites.

For a more thorough discussion of the history of this action, including the limited remand by the Federal Circuit, see the court's February 23, 2017 order (ECF No. 691).

Both the "User Guide" and "Installation and Quick Start Manual," of the MSVM provide a full explanation of the MSVM's technical and design features, and are attached as Exhibits 3 & 4 to Schneider's renewed motion for summary judgment. See ECF No. 718, Ex. 3 (User Guide); Ex. 4 (Installation and Quick Start Manual).

A solid green LED indicated that the MSVM was operating within normal current input conditions. ECF No. 718, Ex. 3 at 6. The LED would then flash green to indicate that the MSVM was approaching maximum current input. Id. Finally, the LED would show a solid red color when the MSVM had exceeded its maximum current threshold and was in an overload condition. Id.

A copy of the Lee patent is attached as Exhibit 6 to Schneider's renewed motion for summary judgment. See ECF No. 718, Ex. 6.

A copy of the Liu patent is attached as Exhibit 7 to Schneider's renewed motion for summary judgment. See ECF No. 718, Ex. 7.

A copy of the Chapman patent is attached as Exhibit 8 to Schneider's renewed motion for summary judgment. See ECF No. 718, Ex. 8.