Source: s3://data.kl3m.ai/documents/govinfo/USCOURTS/USCOURTS-cand-3_14-cv-03227/USCOURTS-cand-3_14-cv-03227-4/pdf.json

Nature of Suit Code: 830
Nature of Suit: Patent
Cause of Action: 15:1126 Patent Infringement

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Case No. 5:14-cv-03227-PSG 

ORDER GRANTING-IN-PART MOTION TO STRIKE INFRINGEMENT CONTENTIONS OR 

ALTERNATIVELY TO COMPEL SUPPLEMENTAL INFRINGEMENT CONTENTIONS

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United States District Court

For the Northern District of California

UNITED STATES DISTRICT COURT

NORTHERN DISTRICT OF CALIFORNIA 

SAN JOSE DIVISION

SILICON LABORATORIES INC.,

 Plaintiff,

 v. 

CRESTA TECHNOLOGY CORPORATION,

 Defendant. 

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Case No. 5:14-cv-03227-PSG

ORDER GRANTING-IN-PART 

MOTION TO STRIKE 

INFRINGEMENT CONTENTIONS 

OR ALTERNATIVELY TO COMPEL 

SUPPLEMENTAL INFRINGEMENT 

CONTENTIONS

(Re: Docket No. 44)

A recurring dispute in patent cases is when exactly a patentee can rely on “representative 

products” when providing infringement contentions. While the Northern District’s Local Patent 

Rules require that every limitation of every asserted claim be charted against every accused 

product, this court has not been blind to senselessness of repeating identical multi-page chart after 

multi-page chart when one or more products represent others. And so when a given product is 

claimed to represent others, the court has permitted non-duplicative charting. But when exactly 

does one product “represent” another and what obligation does a patentee have in making such a 

claim? The case at bar shows why something more than just the patentee’s saying it is so is 

required. As set forth below, the court GRANTS Defendant Cresta Technology Corporation’s 

motion to compel supplemental infringement contentions. 

Case 3:14-cv-03227-JCS Document 52 Filed 02/25/15 Page 1 of 6
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Case No. 5:14-cv-03227-PSG 

ORDER GRANTING-IN-PART MOTION TO STRIKE INFRINGEMENT CONTENTIONS OR 

ALTERNATIVELY TO COMPEL SUPPLEMENTAL INFRINGEMENT CONTENTIONS

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I.

This court’s patent rules reflect this court’s view that—especially in patent cases—due 

process requires disclosure. By mandating disclosure in a variety of ways, the rules aim to “make 

the parties more efficient, to streamline the litigation process, and to articulate with specificity the 

claims and theory of a plaintiff’s infringement claims.”1 

As just one example, Patent L.R. 3-1(c) requires a patentee to serve “[a] chart identifying 

specifically where each limitation of each asserted claim is found within each Accused 

Instrumentality.”2 While the rules do not “require the disclosure of specific evidence nor do they 

require a plaintiff to prove its infringement case, . . . a patentee must nevertheless disclose what in 

each accused instrumentality it contends practices each and every limitation of each asserted claim 

to the extent appropriate information is reasonably available to it.”3 The purpose is to “provide 

reasonable notice to the defendant why the plaintiff believes it has a ‘reasonable chance of proving 

infringement.’”4 A party can rely on representative products to meet its obligations.

5

 But “Rule 

3-1 . . . requires Plaintiff to articulate how the accused products share the same, or substantially the 

same, infringing [qualities] with any other product or with the . . . ‘representative’ product[].”6

CrestaTech makes and sells silicon tuners for televisions and set-top boxes. Plaintiff 

Silicon Laboratories Inc. accused CrestaTech and its tuners of infringing six United States patents. 

While this is the first suit between the parties involving all six of these patents, the parties are 

 

1 InterTrust Techs. Corp. v. Microsoft Corp., Case No. 01-cv-01640, 2003 WL 23120174, at *2 

(N.D. Cal. Dec. 1, 2003). 

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 N.D. Cal. Patent L.R. 3-1(c).

3 DCG Sys. v. Checkpoint Techs., LLC, Case No. 11-cv-03792, 2012 WL 1309161, at *2 (N.D. Cal. 

Apr. 16, 2012). 

4 Shared Memory Graphics LLC v. Apple, Inc., 812 F. Supp. 2d 1022, 1025 (N.D. Cal. 2010) 

(quoting View Eng’g, Inc. v. Robotic Vision Sys., 208 F.3d 981, 986 (Fed. Cir. 2000)). 

5 See, e.g., Tech. Licensing Corp. v. Grass Valley USA, Inc., Case No. 12-cv-06060, 2014 WL 

3752108, at *3 (N.D. Cal. July 30, 2014). 

6 Bender v. Freescale Semiconductor, Inc., Case No. 09-cv-01156, 2010 WL 1689465, at *3 (N.D. 

Cal. Apr. 26, 2010). 

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Case No. 5:14-cv-03227-PSG 

ORDER GRANTING-IN-PART MOTION TO STRIKE INFRINGEMENT CONTENTIONS OR 

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engaged in various cases involving different patents than those that are at issue here, including: 

(1) Cresta Technology Corporation v. Silicon Laboratories, Inc. et al., Case No. 14-cv-00078 

(D. Del. Jan. 21, 2014); (2) Certain Television Sets, Television Receivers, Television Tuners, and 

Components Thereof, Inv. No. 337-TA-91 (I.T.C. Jan. 28, 2014); (3) Silicon Laboratories, Inc. v. 

Cresta Technology Corporation, IPR2014-00728 (P.T.A.B. May 5, 2014); (4) Silicon 

Laboratories, Inc. v. Cresta Technology Corporation, IPR2014-00809 (P.T.A.B. May 23, 2014); 

and (5) Silicon Laboratories, Inc. v. Cresta Technology Corporation, IPR2014-00881 (P.T.A.B. 

June 4, 2014). 

Last month, Silicon Labs served CrestaTech with its Rule 3-1(c) disclosure of asserted 

claims and infringement contentions, naming CrestaTech’s “XC5000 silicon tuner” and the 

“X7/CTC7xx tuner” as Accused Instrumentalities.7 The XC5000 is not, however, a distinct 

product. That term refers instead to two distinct CrestaTech products—the XC5000ACQ and the 

XC5000CCQ tuners.8 Silicon Labs only charted the XC5000ACQ tuner;9 it did not provide claim 

charts for either the XC5000CCQ or any product in the accused X7 line.10

According to Silicon Labs, CrestaTech “has represented in public documents” that the X7 

line of products “is reasonably similar in structure and/or operation to the XC5000[ACQ].”11 

CrestaTech disputes this and urges that the tuners in fact employ different wireless communication 

systems.12 CrestaTech goes further, saying that, if anything, publicly available marketing 

documents clearly highlight the differences between the X7 line and CrestaTech’s XC5000 

products.13 CrestaTech also points out that, similar to the XC5000ACQ, the XC5000CCQ and the 

 

7 See Docket No. 44-2 at 3. 

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 Docket No. 44-4. 

9 See id.; Docket No. 44-2, App’x G at v.

10 See Docket No. 44-2 at 3.

11 Id.

12 See Docket No. 44-4. 

13 Compare Docket No. 44-2 at App’x H (describing the XC5000 products, which use BiCMOS 

technology) with Docket No. 44-3 (describing the X7 tuners as containing a “low cost CMOS 

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Case No. 5:14-cv-03227-PSG 

ORDER GRANTING-IN-PART MOTION TO STRIKE INFRINGEMENT CONTENTIONS OR 

ALTERNATIVELY TO COMPEL SUPPLEMENTAL INFRINGEMENT CONTENTIONS

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X7 products are publicly available, as is relevant information about the products, such as product 

briefs that would permit Silicon Labs to do a tear-down of each accused product.14

Not satisfied with Silicon Labs’ disclosures, CrestaTech now moves the court for relief in 

one of two forms: an order striking the contentions altogether or at least an order compelling 

Silicon Labs to chart each product. 

II.

This court has jurisdiction under 28 U.S.C. §§ 1331 and 1338. The parties further 

consented to the jurisdiction of the undersigned magistrate judge under 28 U.S.C. § 636(c) and 

Fed. R. Civ. P. 72(a). 

III. 

Bender is clear that, in order to rely on a claim that one accused product represents another 

for purposes of Rule 3-1(c), a patentee must do more than state as much. A patentee must state 

how.

15 Silicon Labs’ contentions fail this basic test.

First, CrestaTech has not, as Silicon Labs suggests, made sufficient judicial admissions in 

the parties’ ITC proceedings. Silicon Labs is right that in the ITC case it brought, CrestaTech 

agreed to a consent order in that case that bars CrestaTech from importing tuners that infringe the 

asserted claims. Silicon Labs also is right that before that consent order it charged all SC5000 and 

X7 products with infringement using just the XC5000 charts as representative of all products 

accused. But even if the consent order could be read as admitting that all accused products infringe 

in the same way, that case only involved two of the six patents at issue here. CrestaTech said 

 

process”); see also Docket No. 44-2, App’x G at v (third-party analysis describing the 

XC5000ACQ tuner as employing the “SiGe BiCMOS” process type). 

14 See Docket No. 44-2, App’x G at v.

15 See also Ameranth, Inc. v. Pizza Hut, Inc., Case Nos. 12-cv-00729 et al., 2013 WL 3894880, at 

*7 (S.D. Cal. July 26, 2013) (“While [the plaintiff] says it identified the accused versions 

temporally, by their functional aspects or by their version names or numbers, it must at least state 

how the accused previous versions are the same or reasonably similar to the charted version, or else 

provide a separate chart for each version.”); Infineon Techs. AG v. Volterra Semiconductor Corp., 

Case No. 11-cv-06239, 2012 WL 6184394, at *3 (N.D. Cal. Dec. 11, 2012) (“the plaintiff 

nevertheless must ‘articulate how the [unknown] accused products share the same, or substantially 

the same, infringing [structure]’ with a named product”). 

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Case No. 5:14-cv-03227-PSG 

ORDER GRANTING-IN-PART MOTION TO STRIKE INFRINGEMENT CONTENTIONS OR 

ALTERNATIVELY TO COMPEL SUPPLEMENTAL INFRINGEMENT CONTENTIONS

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nothing about the other four. Similarly, in the ITC case brought by CrestaTech, CrestaTech at 

most acknowledged that its products practice its own patents, not the patents asserted by Silicon 

Labs in this case.

Second, the product brief for the XC5000 cited by Silicon Labs does not explain how the 

accused products share the same allegedly infringing structure. In contrast to the product manuals 

in Tech Licensing Corp., the brief here suggests different structures that are material to 

infringement of at least one of the asserted claims: Claim 3 of United States Patent No. 6,304,146. 

In particular, the briefs depict both XC5000ACQ and XC5000CCQ tuners as using BiCMOS 

technology, but with the former comprising one in a package and the latter packaging comprising 

two dies. The X7 products use CMOS and BiCMOS technology and unlike the XC5000ACQ, 

comprise two dies in the packaging. Because Claim 3 requires a single integrated circuit, the 

apparent structure of two dies—or two circuits—is significant.

 The court does not mean to suggest that Silicon Labs must tear down—or reverse 

engineer—each accused product to meet its burden. This court has repeatedly held that reverse 

engineering is not required to provide sufficient infringement charts.16 But Silicon Labs must look 

to the information available to it to explain how the non-charted products work in the same 

material fashion as those charted. This it has not done. 

 No later than 21 days from this order, Silicon Labs shall serve separate infringement 

contention charts for each accused product. Lest there be any doubt, the court does not intend to let 

this hiccup delay this case. CrestaTech therefore is advised that in the meantime it may not delay 

serving its invalidity contentions. To the extent the supplemental infringement contention charts 

 

16 See, e.g., Bender, 2010 WL 1689465, at *4 (noting that reverse engineering is not a per se 

requirement); France Telecom, S.A. v. Marvell Semiconductor, Inc., Case No. 12-cv-04967, 2013 

WL 1878912, at *3 (N.D. Cal. May 3, 2013) (same); Creagri, Inc. v. Pinnaclife Inc., LLC, Case 

No. 11-cv-06635, 2012 WL 5389775, at *3 (N.D. Cal. Nov. 2, 2012) (finding plaintiff’s 

infringement contentions sufficient even though it did not provide the weight ratios of the allegedly 

infringing chemical solution and relied exclusively on advertising materials for the facts of its 

contentions); FusionArc, Inc. v. Solidus Networks, Inc., Case No. 06-cv-06760, 2007 WL 1052900, 

at *1 (N.D. Cal. Apr. 5, 2007) (denying defendant’s motion to strike or amend infringement 

contentions where plaintiff used marketing materials to determine how the accused product 

operated instead of reverse engineering). 

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