NOTE: This disposition is nonprecedential. 

United States Court of Appeals for the Federal Circuit 

2009-1170 

SRAM CORPORATION (now known as SRAM, LLC), 

Plaintiff-Appellee, 

v. 

AD-II ENGINEERING, INC., 

Defendant-Appellant. 

 

Richard B. Walsh, Jr., Lewis, Rice & Fingersh, L.C., of St. Louis, Missouri, 

argued for plaintiff-appellee. 

Michael T. Brady, Miller & Chevalier Chartered, of Washington, DC, argued for 

defendant-appellant. 

Appealed from: United States District Court for the Northern District of Illinois 

Judge Robert W. Gettleman
NOTE: This disposition is nonprecedential. 

United States Court of Appeals for the Federal Circuit 

2009-1170 

SRAM CORPORATION (now known as SRAM, LLC), 

Plaintiff-Appellee, 

v. 

AD-II ENGINEERING, INC., 

Defendant-Appellant. 

Appeal from the United States District Court for the Northern District of Illinois in 

consolidated cases nos. 00-CV-6675 and 01-CV-62, Judge Robert W. Gettleman. 

__________________________ 

DECIDED: February 26, 2010 

__________________________ 

Before RADER, BRYSON, and LINN, Circuit Judges. 

LINN, Circuit Judge. 

 In the judicial equivalent of the Tour de France, this bicycle gear shifter patent 

infringement case returns to us for the third time in what will now be its final stage. 

Here, AD-II Engineering, Inc. (“AD-II”) appeals an order of the United States District 

Court for the Northern District of Illinois entering summary judgment of liability in favor of 

SRAM Corporation (“SRAM”) based on the court’s finding that claims 16 and 27 of 

SRAM’s U.S. Patent No. 4,900,291 (the “’291 Patent”) were not invalid and were 

infringed by AD-II. Because we conclude that claims 16 and 27 are anticipated as a 

matter of law, we reverse. 
BACKGROUND 

A. The ’291 Patent 

 The ’291 Patent relates to bicycle gear-shifting systems for multi-speed bicycles. 

These systems generally include a shift actuator (also known as a “shifter”) that is 

connected by a control cable to a derailleur that moves a bicycle chain from one 

sprocket or chain wheel to another. Bicycle gear-shifting systems suffer from “play” 

caused by looseness or yielding of system parts. SRAM Corp. v. AD-II Eng’g, Inc., 465 

F.3d 1351, 1353 (Fed. Cir. 2006) (“SRAM II”). This play (referred to as “cumulative lost 

motion”) must be eliminated before a gear-shifting system can shift gears. Id. A 

common method of removing cumulative lost motion is “overshifting,” i.e., first moving a 

shift actuator “briefly beyond a destination position to take up all of the collective slack in 

the system and move the drive chain slightly beyond the destination sprocket” and then 

“bringing the shift actuator back to its destination position and allowing the drive chain to 

move back into alignment with the destination sprocket.” Id. Overshifting is particularly 

desirable when “downshifting,” that is, moving the bicycle drive chain from a smaller 

chain wheel or sprocket to a larger chain wheel or sprocket. ’291 Patent col.1 ll.55-57, 

col.9 ll.12-14, 19-21. Prior art gear-shifting systems required the rider to move the shift 

actuator in the manner described above, which took considerable skill, as the rider had 

to determine not only the desired amount of overshift but also the duration of the 

overshift. Id. col.1 ll.62-66. 

 The ’291 Patent discloses detent-based rotatable shift actuators that overcome 

these drawbacks by providing built-in overshift. The disclosed shifters eliminate the 

need for a rider to manually overshift a bicycle chain to remove cumulative lost motion 

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as the optimum amount of overshift is “programmed” into each shifter. Id. col.6 ll.14-20. 

This feature has been referred to throughout this litigation as “precision indexed 

downshifting.” SRAM II, 465 F.3d at 1354. Using precision indexed downshifting, a 

rider “need only move from one index position to the next to effect a positive shift 

independent of the cumulative lost motion present in the system.” Id. 

 SRAM asserts that AD-II has infringed claims 16 and 27 of the ’291 Patent. 

Claim 16 recites a method of shifting and reads as follows: 

16. In a bicycle derailleur gear shifting system having a rear derailleur 

shifting mechanism, a shift actuator rotatably mounted on a bicycle 

handlebar generally coaxially of the handlebar, said shift actuator being 

mounted on and engaged over an outside of the handlebar inboard of a 

fixed handgrip on an end of the handlebar, and control cable means 

operatively connecting said actuator to said shifting mechanism, a method 

of performing down-shifting events from a relatively smaller origin 

freewheel sprocket to a relatively larger destination freewheel sprocket, 

which comprises: 

first [moving] rotating said shift actuator a sufficient amount to take up 

substantially all of the cumulative lost motion in said derailleur mechanism 

and said cable means; and 

then [moving] rotating said shift actuator a further amount [to] so as to 

move the bicycle chain at least substantially the distance between the 

centers of said origin and destination sprockets. 

’291 Patent Reexamination Certificate col.4 l.66-col.5 l.17 (issued Apr. 25, 2000) 

(brackets indicate text deleted through amendment; italics indicate text added through 

amendment). Claim 27, which depends from claim 16, adds the limitation “operating 

said shift actuator to perform a series of indexed downshifts”: 

27. A method as set forth in claim 16 further comprising operating said 

shift actuator to perform a series of indexed downshifts in each of which 

the chain of the derailleur mechanism is shifted from a relatively smaller 

2009-1170 3
orgin [sic] freewheel sprocket to a relatively larger destination freewheel 

sprocket, said method comprising for each downshift in said series:

first rotating the shift actuator a sufficient distance to take up substantially 

all of the cumulative lost motion in said derailleur mechanism and said 

cable means; and

then rotating said shift actuator a further amount so as to move the bicycle 

chain at least substantially the distance between the centers of said orgin 

[sic] and destination sprockets.

Id. col.7 l.3-col.8 l.7. 

B. Procedural History 

 In SRAM II, we construed claim 16 and concluded that neither step in that twostep method claim recites “precision indexed downshifting.” Indeed, we observed that 

claim 16 does not recite indexing at all. We made clear that “[c]laim 16 only recites a 

method of shifting wherein first, all of the cumulative lost motion is taken up and second, 

the bicycle chain moves between destination freewheel sprockets. All claim 16 requires 

is a method that takes up lost motion in a bicycle shifting mechanism and then moves 

the derailleur of that mechanism from one sprocket to another. Claim 16 does not recite 

that lost motion is taken up by a manual overshift and backshift motion or by an index 

shift actuator causing a built-in overshift and precise downshift between defined index 

positions (e.g., by ‘precision indexed downshifting’).” SRAM II, 465 F.3d at 1358. At 

bottom, we held that “the claim covers no more than the recited method of taking up lost 

motion and effecting a shift.” Id. at 1359. We then remanded the case to the district 

court. 

 Following that remand, AD-II moved for summary judgment of invalidity of claim 

16, arguing that U.S. Patent No. 4,260,171 issued to Edwin Foster (the “Foster 

reference”) and Japanese Unexamined Patent Application No. 58-191682 (the 

2009-1170 4
“Japanese reference”) each anticipate the claim. SRAM moved for summary judgment 

of infringement of claim 27. 

 The district court denied both parties’ motions. As for the invalidity of claim 16, 

the court found that neither the Foster reference nor the Japanese reference addresses 

taking up cumulative lost motion and that AD-II had failed to show that the problem of 

taking up cumulative lost motion is inherent to all derailleur systems. SRAM Corp. v. 

AD-II Eng’g, Inc., No. 00-CV-6675, slip op. at 1-2 (N.D. Ill. Aug. 2, 2007). The district 

court also concluded that summary judgment of infringement of claim 27 was 

inappropriate because the parties disputed whether AD-II’s shifters perform indexed 

downshifts. Id. at 2-3. The district court then ordered the parties to submit additional 

briefing addressing whether the court should grant summary judgment of infringement 

of claim 16 in favor of SRAM. Id. at 3. 

 As part of its briefing, AD-II submitted an affidavit from Eric Mu, manager of 

research and development at AD-II. Mu declared that for a rider to downshift a bicycle 

using an AD-II shifter, the rider must first rotate the shifter to an overshift position and 

then rotate the shifter back to its normal position. After reviewing this affidavit and the 

parties’ submissions, the court ordered an in-court demonstration of both SRAM’s and 

AD-II’s shifters. According to the court, the demonstration proved that a rider can 

downshift a bicycle by rotating an AD-II shifter in only one direction, despite Mu’s 

affidavit stating the contrary. 

 The district court subsequently entered an amended order granting SRAM 

summary judgment of infringement of claim 16. The district court found that “[c]laim 16 

indicates in express language that cumulative lost motion must be taken up by rotating 

2009-1170 5
the shift actuator in one direction with the shift being effected by further rotation in the 

same direction.” SRAM Corp. v. AD-II Eng’g, Inc., No. 00-CV-6675, slip op. at 5 (N.D. 

Ill. filed June 24, 2008). Because the in-court demonstration established that a rider 

could perform the recited method steps by rotating an AD-II shifter in one direction, the 

court found that AD-II’s shifters infringed claim 16. Id. at 4-5. 

 The district court then granted SRAM’s motion for summary judgment of 

infringement of claim 27 and denied AD-II’s countermotion for summary judgment of 

invalidity of claims 16 and 27. SRAM Corp. v. AD-II Eng’g, Inc., No. 00-CV-6675 (N.D. 

Ill. Sept. 29, 2008) The court entered final summary judgment of liability in favor of 

SRAM on December 16, 2008, SRAM Corp. v. AD-II Eng’g, Inc., No. 00-CV-6675 (N.D. 

Ill. Dec. 16, 2008), and AD-II filed a timely appeal. We have jurisdiction pursuant to 28 

U.S.C. § 1295(a)(1) (2006). 

 On appeal, AD-II argues that the district court erroneously concluded that the 

Japanese reference does not anticipate claims 16 and 27. Because we agree that the 

claims are anticipated by the Japanese reference, we do not address the other issues 

raised by AD-II. 

DISCUSSION 

A. Standards of Review 

 We review a district court’s grant of summary judgment de novo. Revolution 

Eyewear, Inc. v. Aspex Eyewear, Inc., 563 F.3d 1358, 1365 (Fed. Cir. 2009). Summary 

judgment is appropriate when there is no genuine issue as to any material fact and the 

moving party is entitled to judgment as a matter of law. Fed. R. Civ. P. 56(c). When 

determining whether a genuine issue of material fact exists, we view the evidence in the 

2009-1170 6
light most favorable to the nonmoving party and resolve all doubts in its favor. Eli Lilly & 

Co. v. Barr Labs., Inc., 251 F.3d 955, 962-63 (Fed. Cir. 2001). Although anticipation is 

a question of fact, we may decide it on summary judgment if there is no genuine dispute 

of material fact. Leggett & Platt, Inc. v. VUTEk, Inc., 537 F.3d 1349, 1352 (Fed. Cir. 

2008). 

B. Anticipation 

 The Japanese reference relates to gear-shifting mechanisms for bicycles. As 

described in an English translation of the reference, these mechanisms include “a gear 

ratio switching unit; for example, a unit comprised of a multi-speed planetary gear . . . a 

chain shifter for shifting the drive chain to each of these gears . . . [and] an operating 

apparatus and coupling members for coupling this to the gear ratio switching unit.” J.A. 

4571. These gear-shifters “allow the rider to shift the gear ratio by gripping and rotating 

the operating member during operation.” Id. The reference discloses arranging “the 

operating member . . . in its standard axial orientation at a location on the mounting unit 

far from the end of the handlebar axially when the mounting unit is mounted on the end 

section of the handlebar.” Id. 4572. “As a result, the rider’s hand can grip the 

handlebar part between the end of the handlebar and the operating member axially.” Id. 

 According to AD-II, SRAM has conceded that the Japanese reference discloses 

all of the structural details recited in claim 16. AD-II contends that the reference 

inherently discloses the method limitations, as the undisputed evidence shows that all 

rotary gear shifters must perform the claimed method to shift gears. AD-II also 

contends that the Japanese reference discloses the limitation added by claim 27. 

2009-1170 7
 SRAM disagrees that the Japanese reference anticipates claims 16 and 27. 

SRAM contends that the Japanese reference does not mention the problem of 

cumulative lost motion, much less offer a solution for it. SRAM also contends that ADII’s claim that all rotary gear shifters perform the method steps of claim 16 is belied by 

AD-II’s argument that AD-II’s shifters do not take up cumulative lost motion. Regarding 

claim 27, SRAM argues that AD-II has presented no evidence to support AD-II’s 

anticipation contentions. According to SRAM, AD-II relies solely on the unsupported 

arguments of AD-II’s counsel. 

 As SRAM clarified at oral argument, SRAM also argues that the Japanese 

reference is not enabling and therefore cannot anticipate the asserted claims. During a 

reexamination of the ’291 Patent, SRAM submitted to the United States Patent and 

Trademark Office (“Office”) a declaration from the inventor of the Japanese reference 

stating that he never made a functional model of the invention that worked with a 

derailleur and, to his knowledge, such a device was never made. SRAM also claims 

that during the reexamination it demonstrated to the Office that a model of the device 

described in the Japanese reference could not perform the method recited in claim 16. 

SRAM believes that this demonstration and the inventor’s declaration prove that the 

Japanese reference is inoperable and therefore not enabling. 

 For a prior art reference to anticipate a patent, it must disclose each and every 

limitation of the claimed invention. Schering Corp. v. Geneva Pharms., Inc., 339 F.3d 

1373, 1377 (Fed. Cir. 2003). “[A] prior art reference may anticipate without disclosing a 

feature of the claimed invention if that missing characteristic is necessarily present, or 

inherent, in the single anticipating reference.” Id. However, a patent claim “cannot be 

2009-1170 8
anticipated by a prior art reference if the allegedly anticipatory disclosures cited as prior 

art are not enabled.” Elan Pharms., Inc. v. Mayo Found. for Med. Educ. & Research, 

346 F.3d 1051, 1054 (Fed. Cir. 2003). “The standard for what constitutes proper 

enablement of a prior art reference for purposes of anticipation under section 102, 

however, differs from the enablement standard under section 112.” Rasmusson v. 

SmithKline Beecham Corp., 413 F.3d 1318, 1325 (Fed. Cir. 2005). It is well-settled that 

utility or efficacy need not be demonstrated for a reference to serve as anticipatory prior 

art under section 102. See In re Schoenwald, 964 F.2d 1122, 1124 (Fed. Cir. 1992); 

Bristol-Myers Squibb Co. v. Ben Venue Labs., Inc., 246 F.3d 1368 (Fed. Cir. 2001). 

 We begin our anticipation analysis with claim 16. We agree with AD-II that the 

Japanese reference discloses every limitation recited in this claim even under the 

construction of the claim adopted by the district court. SRAM does not dispute that the 

Japanese reference discloses the structural details recited in claim 16, and there is no 

genuine issue of material fact that the device disclosed in the Japanese reference must 

perform the method steps of claim 16 to shift gears as described in the reference. 

Although the district court held that claim 16 required rotation in the same direction to 

take up cumulative lost motion and effect a shift, that does not provide a basis to 

distinguish the Japanese reference. 

 SRAM’s expert acknowledged that a shifter built according to the disclosure of 

the Japanese reference would “effect a shift.” J.A. 2921. And both parties’ experts 

stated that a gear shifting system must remove cumulative lost motion before shifting 

gears. See id. 2526.080 (“That’s just shifting 101. That’s how you shift a bike. Unless 

you perform [the method steps of claim 16], there is no shifting.”); id. 2526.086 (“[I]t 

2009-1170 9
would be fair to say that lost motion must be first taken up before there is any motion of 

the derailleur system.”). Although SRAM’s expert declared that “[o]ne of ordinary skill in 

the art would not find inherent in JP ’682 a solution to the problem of cumulative lost 

motion,” id. 3585, he admitted that cumulative lost motion would have been present in 

the gear shifting device described by the Japanese reference and that the device would 

have removed the lost motion: 

While cumulative lost motion would have been present in any device 

constructed in accordance with the disclosure of Foster ’171 or JP ’682 

and in order for such a device to shift gears it would have had to remove 

the lost motion, there is absolutely no recognition of the problem in either 

of these references, no attempt to solve the problem, and no suggestion of 

a method for compensating for cumulative lost motion in either reference. 

Though prior art shifters such as Foster ’171 and JP ’682 may have 

compensated for cumulative lost motion, they did so in a clumsy and 

imprecise way . . . . 

Id. 2922. SRAM argues that this statement merely shows that the Japanese reference 

might shift gears, presumably because SRAM’s expert stated that the Japanese 

reference “may have compensated for cumulative lost motion.” However, when 

considered in context, the statement is a clear admission that the device described in 

the Japanese reference suffered from lost motion and would have necessarily removed 

any cumulative lost motion before shifting gears. 

 SRAM’s remaining arguments regarding inherency are equally unpersuasive. It 

is irrelevant that the Japanese reference may not have recognized the problem of 

cumulative lost motion or explicitly suggested a solution for it. See Schering Corp., 339 

F.3d at 1377 (rejecting the contention that inherent anticipation requires recognition in 

the prior art). Nor is it relevant that AD-II argued that its shifters do not perform the 

recited method. What is relevant is that the Japanese reference describes shifting 

2009-1170 10
gears by rotating a shifter (i.e., the operating member). Here, there is no genuine issue 

of material fact that the rotation of the shifter in the Japanese reference necessarily 

results in the removal of cumulative lost motion before a shift is accomplished. Because 

we previously determined that claim 16 does not recite precision indexed downshifting, 

this is all that is needed to anticipate the claim. 

 We also agree with AD-II that the Japanese reference discloses each limitation of 

claim 27. Claim 27 adds the limitation “operating said shift actuator to perform a series 

of indexed downshifts.” ’291 Patent Reexamination Certificate col.7 ll.3-5. Contrary to 

SRAM’s contentions, AD-II points to specific teachings in the Japanese reference to 

support its anticipation argument. AD-II notes that the Japanese reference discloses an 

“operating member being adjustably rotatable to several specific angles centered on the 

axis of the mounting unit, these several specific angles being correlated with different 

gear ratios states,” J.A. 4568 (element numbers omitted). AD-II also points out that the 

reference discloses a detent-based “stopping means for regulating the specific angle of 

the operating member,” id. 4570 (element numbers omitted), and explains that the 

disclosed device performs indexed downshifts because the device is used “to shift the 

drive chain between several gears mounted on the drive wheel,” id. 4574. Because 

SRAM failed to challenge these teachings and because no other genuine issues of 

material fact have been raised, summary judgment of invalidity of claim 27 is 

appropriate. 

 Finally, there is no genuine issue of material fact that the Japanese reference is 

enabling in the sense required to support anticipation under section 102. The 

declaration provided by the inventor of the Japanese reference merely stated that he

2009-1170 11
2009-1170 12

never created a model of the shifter described in the reference that worked with a 

derailleur and that he was unaware of anyone who had. The question, however, is not 

whether the inventor built or could have built an operative model of the device, but 

whether the reference discloses each of the steps of the claimed method. Schering 

Corp., 339 F.3d at 1380 (noting that a prior art reference may be enabling “even if [its] 

author or inventor did not actually make or reduce to practice [the disclosed] subject 

matter.” (citation omitted)). As noted above, we find no genuine issue of material fact as 

to the disclosure in the Japanese reference of each of the method steps recited in 

claims 16 and 27. SRAM’s contention that the demonstration it conducted during the 

reexamination proceeding proved that the shifter cannot perform the method of 

downshifting described in the claims is both inapposite and irrelevant. This 

demonstration simply provides evidence that the model built does not perform precise 

indexed downshifting, which is not recited in either claim 16 or claim 27. 

 Because there are no genuine issues of material fact on this record that the 

Japanese reference discloses each and every limitation of claims 16 and 27 and 

contains an enabling disclosure in the sense of section 102, we hold as a matter of law 

that the Japanese reference anticipates claims 16 and 27. In light of our holding, we 

need not and do not address AD-II’s remaining arguments. 

CONCLUSION 

 The district court’s denial of AD-II’s motions for summary judgment of invalidity of 

claims 16 and 27 based on the Japanese reference is reversed. 

REVERSED