MediaTek, Inc. v. Sanyo Electric Co., Ltd. et al.

I'll research this case thoroughly before drafting. Let me start with parallel searches.

Good initial results. Let me verify the companion California case, settlement specifics, and patent provenance.

Case Overview & Background

The parties: two operating companies, not an NPE scenario. Plaintiff MediaTek, Inc. is a Taiwanese fabless semiconductor company headquartered in Hsinchu (Science Park), which designs — but does not fabricate — integrated chipset solutions for optical storage (CD/DVD drives), DVD players/recorders, digital televisions and, later, mobile handsets. Defendants are Sanyo Electric Co., Ltd. of Osaka, Japan, the vertically integrated Japanese consumer-electronics and battery conglomerate (which also manufactured its own LSI), and its U.S. distribution subsidiary Sanyo North America Corporation (Delaware, based in San Diego, CA). The docket and complaint caption the U.S. entity as "Sanyo North America Corporation"; some secondary databases also list "Sanyo North America, Inc." and "Sanyo North American Corporation," which appear to be naming variations for the same San Diego subsidiary. Critically, both sides were practicing, product-selling competitors — this was a portfolio-vs.-portfolio standoff between two Asian component/consumer-electronics manufacturers, not a patent-assertion-entity suit. MediaTek's own complaint confirms it sued "by assignment" on all three patents, and a Taiwanese academic study of the dispute (NTU thesis, doi:10.6342/NTU202000766) reports that MediaTek acquired the '819 and '356 patents from Nippon Steel Corporation and the '486 patent from Sarnoff Corporation, while its own self-prosecuted patent ('151) was asserted only in the California mirror case. That provenance detail matters analytically — MediaTek was assembling acquired third-party portfolios for counterassertion — but it rests on secondary sources, so treat it as well-supported rather than docket-confirmed.

The accused technology and the patents. MediaTek's Second Amended Complaint (available via RPX Insight, litigation doc. 2377627) accused Sanyo's audio decoders, DVD recorders (specifically the DRW-1000), DVD players, digital television sets, set-top boxes and mobile electronic devices — "and/or integrated circuits for use therein" — of infringement. The three patents are all MPEG-era signal-processing patents: U.S. 5,867,819, "Audio Decoder" (issued Feb. 2, 1999) claims a multi-channel audio decoding architecture using inverse modified discrete cosine transform (IMDCT) circuitry and down-mixing/buffering of multi-channel frequency-domain audio; U.S. 6,118,486, "Synchronized Multiple Format Video Processing Method and Apparatus" (issued Sept. 12, 2000) claims generating a system clock and a frequency-scaled raster clock from an MPEG program clock reference (PCR) to synchronize a display across multiple video display formats (i.e., format-agnostic video timing/scaling); and U.S. 5,751,356, "Video/Audio Signal Coding System and Method" (issued May 12, 1998) claims an MPEG-based video/audio encoding arrangement in which "data number information" (picture bit-length) is generated and multiplexed with encoded video to offload the host processor. The '356 patent was added by amended complaint in October 2006, expanding the accused set to DVD recorders, digital cameras and cellular phones (MediaTek 2005 Q4 financial-report litigation note). All three are means-plus-function-heavy claim sets — a fact that shaped the case.

Procedural posture and venue. MediaTek filed on August 31, 2005 in the Tyler Division of the Eastern District of Texas, Civil Action No. 6:05-cv-323, before Judge Leonard Davis — then the defining figure of the EDTX "rocket docket." The posture was a deliberate reverse-race: Sanyo had sued first, in April 2005, in the Central District of California (Sanyo Elec. Co. v. MediaTek, Inc., C.D. Cal., later No. 2:06-cv-01225), asserting U.S. 5,499,252 and 5,818,801 (CD-ROM decoder and shock-proof optical reproduction), later adding 6,594,213 and 6,487,616; MediaTek counterclaimed there with U.S. 6,003,151. MediaTek's lead trial counsel later explained in a Law360 interview (reproduced at sheppardmullin.com) that the Texas suit was filed to win a trial date roughly four months ahead of Sanyo's California case, and that the gambit worked — until Sanyo identified 1,500+ additional accused products with under two months of discovery left. Judge Davis granted MediaTek's expedited motion to compel, ordering document production within seven days and cost-shifting for two dozen retaken depositions, and the trial date held. Claim construction came down on March 26, 2007 (Memorandum Opinion and Order, Doc. 344; copy at govinfo.gov and CourtListener op. 2502199); the court construed all three patents, reading the '356 "video encoding means" as limited to an MPEG-standard encoder/header-creation/multiplexer structure but rejecting Sanyo's attempts to narrow it to MPEG-1/MPEG-2 and to exclude the bit-length data from the encoded stream — a mixed but net-helpful outcome for MediaTek. On the eve of opening argument (settlement announced May 30, 2007; case terminated that day), the parties dismissed both suits with prejudice and exchanged cross-licenses under the patents asserted in each case, with no disclosed payment (Sanyo/MediaTek joint announcement, reproduced at cdrinfo.com).

Why it is notable. Four things make this case worth studying. First, it is an unusually clean example of forum arbitrage by an operating company: a Taiwanese plaintiff used EDTX not as a patent-troll refuge but as a lever to seize the trial date from a Japanese defendant that had chosen its own home district, illustrating that the rocket docket's pull in the mid-2000s was not limited to NPEs. Second, it is a documented case study in docket-management under accelerated discovery — Judge Davis's seven-day production order and deposition cost-shifting is the kind of hard-nosed case management that defined EDTX practice in that era. Third, it produced a Federal Circuit privilege ruling on the eve of Seagate: In re MediaTek, Inc., 230 F. App'x 970 (Fed. Cir. 2007) (mandamus denied; opinion filed April 3, 2007, per the Fed. Cir. docket 07-M844), in which the court declined to defer ruling until the en banc In re Seagate Technology decision and refused to shield advice-of-counsel opinions MediaTek claimed were unrelated to the accused chips — reinforcing the broad waiver that Seagate later recalibrated. Fourth, the industry context is a dense 2005–2007 DVD/optical-storage patent war: MediaTek was simultaneously litigating Zoran/Oak (ITC Inv. No. 337-TA-506), Matsushita (N.D. Cal. and E.D. Tex. No. 2:05-cv-484), and VIA, while Sanyo was sliding into the losses that led to its 2008–09 absorption by Panasonic — and the MediaTek–Sanyo cross-license is generally read in Taiwanese sources as a "draw," with MediaTek publicly stating it had accrued no royalty reserve to reverse. Note that no PTAB/IPR linkage exists: the case settled in 2007, five years before the AIA created the IPR regime, and given their mid-1990s priority dates all three patents are long since expired — so any modern proceeding involving these numbers would be a different patent family entirely.

Sourcing caveats: the docket-level facts (filings, dates, Doc. 344, judgment) are grounded in govinfo/CourtListener; the settlement terms come from the parties' own press release; the acquisition provenance of the patents and the "draw" characterization come from a secondary Taiwanese master's thesis and Taiwan-press reporting, not from primary U.S. documents. Attorney names are omitted because I could not confirm them from a reliable source within this session.

I'll research this case across docket sources, opinions, and related proceedings.

Now let me pull the docket and related filings.

Scope note

This case closed in 2007, before PACER's modern document system, and the full docket is not freely indexed. I was able to retrieve and ground: the file-stamped Markman opinion (Dkt. 344), a post-Markman claim-construction order (2007-05-03), the second amended complaint, the Federal Circuit's mandamus ruling in the parallel California action, and trial-counsel commentary. Where I could not verify a docket entry or date, I say so explicitly rather than fill it in.

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1. Filing and initial pleadings

Accused technology: audio decoders and products containing them — DVD recorders, DVD players, digital televisions, set-top boxes, mobile devices (model DRW-1000 named), and the integrated circuits inside them. The Law360 interview with plaintiff's trial counsel describes "integrated chipset solutions for compressing video and audio data in cameras, DVDs and televisions," with roughly 50 accused products at filing, later ballooning to 1,500+.

Answer/counterclaims: I could not verify the date or content of Sanyo's answer and counterclaims from a primary source. Given the posture (Sanyo had already sued MediaTek in California and litigated invalidity and non-infringement through claim construction — it argued anticipation of '356 claim 4 as of May 2007), declaratory-judgment counterclaims of non-infringement and invalidity were almost certainly pleaded, but treat that as inference, not a cited fact.

Note on party names: the metadata lists "Sanyo North America, Inc." and "Sanyo North American Corporation"; both appear in the 513 F. Supp. 2d caption, so both were in the case at the Markman stage.

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2. Pre-trial motions of substance

• Motion to dismiss / transfer / stay: I found no evidence of a Rule 12(b) motion, § 1404(a) transfer motion, or first-filed stay motion in this action. That is notable: both defendants were Japanese or Delaware/California corporations, and Sanyo had filed first in the Central District of California, yet the case stayed in Tyler. The absence of a transfer fight is consistent with the plaintiff's counsel's account that MediaTek deliberately raced the Texas case to a trial date four months ahead of Sanyo's California trial date.
• Motion to stay pending IPR: not applicable — see §7.
• Summary judgment: none reached. The case settled three weeks after the last claim-construction order and before any dispositive-motion practice of substance. No SJ opinion exists.
• Discovery motions are where the real pretrial combat occurred (see §4).

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3. Claim construction (Markman) — the only merits ruling

Memorandum Opinion and Order, 2007-03-26, Dkt. 344, reported at 513 F. Supp. 2d 778 (E.D. Tex. 2007) (2007 WL 951690; 2007 U.S. Dist. LEXIS 21324). A hearing was held (date not verified in the sources retrieved).

The court construed all disputed terms across the three patents, and the '819 and '356 means-plus-function limitations were narrowed substantially against MediaTek — the single most consequential development in the case:

'356 patent (video/audio coding):

• "Video encoding means" → structure limited to "a video signal encoder including an encoder circuit utilizing an MPEG standard, a header creation circuit, and a multiplexer circuit; and equivalents." The court rejected MediaTek's bid for any generic encoder circuit, but rejected Sanyo's bid to limit it to MPEG-1/MPEG-2 specifically (MPEG was an evolving standard; dependent claim 3's MPEG-1/MPEG-2 recitation cannot be read into claim 1).
• "Audio encoding means" → "an audio signal encoder that is separate from the video signal encoder circuit and that implements audio compression according to an MPEG standard" — again narrower than MediaTek proposed.
• "Multiplexing means" → "a multiplexer circuit separate from the processor" (court modified Sanyo's "discrete multiplexer" proposal).
• Sub-terms: "data number information" = "a value indicative of the bit length of a picture" (Sanyo's "not part of the encoded video data" gloss rejected); "predetermined video data unit" = "a predetermined set of pictures" (GOP limitation rejected); "header information" = "data that carries information about video data" (GOP-header-only reading rejected).
• "System header" → agreed: "a data structure that is combined with the encoded video and audio data streams."

'819 patent (audio decoder) — the biggest win for Sanyo:

• Applying WMS Gaming and Harris Corp. v. Ericsson, the court held that because the '819 specification discloses circuits only in terms of equations (the patent never uses "processor" or "computer" but uses "circuit" 100+ times), the algorithms must be part of the structure. MediaTek's argument that the patent covered generic hardware or software implementations was rejected as "unconvincing."
• "Frequency domain down mixing means" → "a frequency domain down mixing circuit as shown in element 40 of Figure 7 or element 101 of Figure 8 that is constructed to implement equation (4)" (+ claim 6's added "eliminating" function).
• "Frequency base to time base converting means" → "an IMDCT circuit implementing equation (2), (5), or (6)" (equation (6) only for claim 11).
• "Down mixing means" (claims 13/16) → "a down mixing circuit that implements equation (3)"; "separating means" → demultiplexer.
• Net effect: infringement would require the accused Sanyo decoders to map onto specific IMDCT and down-mixing circuits implementing specific equations, a materially harder proof problem for MediaTek.

'486 patent (digital TV video processing) — mostly a win for MediaTek:

• Court rejected Sanyo's attempts to import "nonstandard frequency," "easily derived," and "single VCO" limitations. "Clock circuit" = "a collection of electrical elements for producing clock signals"; "frequency scaling" = "multiplying and/or dividing a frequency by a given factor"; "raster clock signal" = "a periodic signal used to synchronize a display device in response to a PCR"; "fixed frequency" needed no construction.

Post-Markman order, 2007-05-03 (Dkt. entry not verified): Judge Davis addressed claim 4 of the '356 patent, which the parties had not submitted for construction and had agreed would receive its ordinary meaning. The court held Sanyo had waived prosecution-history-estoppel and "sole embodiment" arguments by that agreement, but warned Sanyo could still argue anticipation of claim 4, and that an ordinary-meaning construction "is therefore likely to be broad and problematic for both parties." The court ordered a joint proposed construction by 2007-05-10 or a notice that the court must construe the term. This is the last substantive ruling in the case.

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4. Discovery milestones with strategic significance

The decisive discovery event was a scope explosion roughly two months before the close of discovery: Sanyo identified over 1,500 additional accused products, forcing document collection from Japan and re-opening fact discovery on a compressed clock. MediaTek filed an **expedited motion to

I'll research the docket and contemporaneous filings for plaintiff-side counsel in this case.

Strong hits. Let me verify the docket-level details and the Perkins Coie / additional names.

Bottom line

MediaTek's side was staffed as a two-firm team: Paul, Hastings, Janofsky & Walker LLP (San Diego / Palo Alto / Washington, D.C.) as national lead counsel, with Stephen S. Korniczky as the lead trial lawyer, and McKool Smith, P.C. (Marshall and Dallas, Texas) as local/Texas counsel, with Sam Baxter designated "Attorney-in-Charge" on the pleadings. That structure is confirmed by the signature block of MediaTek's October 27, 2005 filing and by the counsel block printed with Judge Davis's claim-construction opinions.

Caveat on method: the E.D. Tex. docket for this 20-year-old closed case is not freely retrievable in full (PACER archive only; third-party aggregators such as Docket Alarm/RPX expose only fragments), so I have reconstructed the appearance list from (a) reproduced filings, (b) the court's own counsel block in the published opinions, and (c) firm/Law360 confirmations. Roles marked "inferred" are my characterization from the signature-block designations, not statements by the court.

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A. Lead / national counsel — Paul, Hastings, Janofsky & Walker LLP

Korniczky's own account (Law360 Q&A, May 3, 2013) states: "I represented the plaintiff in MediaTek Inc. v. Sanyo Electric Co., before Judge Leonard Davis in the Eastern District of Texas," and describes the team scaling to "25 attorneys who were taking four depositions a day" — consistent with the unusually large Paul Hastings roster below.

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B. Local / Texas counsel — McKool Smith, P.C.

Baxter's block on the October 27, 2005 filing reads "Sam Baxter, Attorney-in-Charge … ATTORNEY FOR PLAINTIFF MEDIATEK, INC." — the standard E.D. Tex. local-counsel designation.

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C. Additional Paul Hastings personnel in the court's 2007 counsel block

Judge Davis's May 3, 2007 opinion and the March 26, 2007 claim-construction memorandum (Dkt. 344) print a consolidated "for Plaintiff" roster. Beyond the five Paul Hastings lawyers above, it lists the following, all attributed to Paul Hastings. I could not independently verify individual roles or bar numbers for this group; treat titles as inferred (junior partner/associate level):

• San Diego: Ali Shalchi; Amy Simpson; April M. Wurster; James Vincent Fazio III; Martin R. Bader; Robert C. Matz; Trevor Coddington; Vid R. Bhakar.
• Washington, D.C.: Paul J. Wilson; Erin E. Sears; Bhaskar Karkarla.

The size of this roster is consistent with Korniczky's account of the discovery crunch (1,500+ accused products, 25 attorneys taking four depositions a day) and suggests these were document-review and deposition-team members rather than named advocates.

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D. Entries I could not verify — flagged, not asserted

1. John E. Peterson (Perkins Coie LLP, Santa Monica, CA). He appears inside the plaintiff grouping of the counsel block in the May 3, 2007 opinion. No MediaTek filing I reviewed bears

I'll research the docket and counsel appearances for this case.

Bottom line

I could not verify the defense-side appearances from accessible sources, and I will not name Sanyo's attorneys without a docket citation. Here is what the record I could retrieve does and does not show, plus exactly where the answer sits on the docket.

What I was able to verify

The only full-text filings from this case that surfaced in free sources are MediaTek's own papers and the court's claim construction opinion. They confirm the plaintiff's roster, which is useful as a cross-check on the caption format and the docket's attorney-block conventions:

Sources: MediaTek's Oct. 27, 2005 filing in 6:05‑cv‑323 (attorney block reproduced at https://insight.rpxcorp.com/litigation_documents/2377627); Korniczky Law360 Q&A (https://www.sheppardmullin.com/assets/htmldocuments/1191.pdf); McKool Smith bio (http://www.mckoolsmith.com/assets/pdf/bio_109.pdf); Dkt. 344, 3/26/2007 claim construction opinion (https://www.govinfo.gov/app/details/USCOURTS-txed-6_05-cv-00323/USCOURTS-txed-6_05-cv-00323-0).

What I could not verify — Sanyo's counsel of record

No defense attorney name, firm, or appearance date appeared in any source I could reach:

• GovInfo hosts only Dkt. 344 (the Markman opinion), which is a merits document with no attorney signature blocks for either side — so it yields nothing on defense counsel.
• CourtListener/RECAP has the opinion (250 F.3d-era cite: MediaTek v. Sanyo, 2007 WL / 483 F. Supp. 2d 782) but no RECAP docket sheet for this 2005 E.D. Tex. case, which predates broad RECAP coverage.
• Aggregators are internally unreliable here: the Ex Parte page (https://ai-lab.exparte.com/case/dct/txed/6:05-cv-00323/mediatek-inc-v-sanyo-electric-co-ltd) reports "No Attorneys" / "No Parties," and its three personal names (Keith F. Giblin, Christopher H. Steger, Judith K. Guthrie) appear in a court-personnel field, not an attorney field — Guthrie was an E.D. Tex. magistrate judge in Tyler. I have not treated any of them as defense counsel.
• No Law360, Reuters Legal, or firm-website item surfaced naming Sanyo's trial team in the Texas action. The Korniczky interview discusses the defense's conduct (1,500 additional accused products; expedited motion to compel) without naming opposing counsel.

So: no defense appearance is confirmed, and none is invented here. If Sanyo's appearances were made in scanned paper filings from 2005–06, they may simply not be full-text indexed.

Where the answer actually lives, and how to close it

This is a short, closed case (~Dkt. 344+ by March 2007), so the appearances are in a narrow band of entries:

1. Dkt. 1–15 — Sanyo's answer/counterclaim and its Rule 7.1 corporate disclosure statement; the signature block will name lead counsel and the local attorney-in-charge.
2. The Rule 26(f) joint report and the Dkt. 344 Markman briefing — joint submissions are signed by both sides' counsel and are the cheapest single source for the full defense team.
3. The 5/30/2007 dismissal order / stipulation — settlement papers identify each side's signatory counsel.
4. The parallel California action — Sanyo's own multi-patent suit against MediaTek in C.D. Cal. (referenced in the Korniczky interview and in later MediaTek pleadings, e.g. MediaTek v. Matsushita, 2:05‑cv‑00484) is likely to have much better electronic docketing, and defense counsel there is a strong candidate for, though not proof of, the Texas team.

I can pull the PACER docket for 6:05‑cv‑323‑LED (or the C.D. Cal. parallel case) and extract the defense appearances with docket-entry citations if you want me to run that next.

One structural note (inference, flagged as such)

E.D. Tex. Local Rule CV‑11 required a lead attorney "attorney-in-charge" with a office in the district, so Sanyo almost certainly appeared through a Tyler/Marshall local firm alongside out-of-state patent counsel — the mirror image of MediaTek's McKool Smith (Marshall) + Paul Hastings (San Diego/Palo Alto) pairing. That is a reasonable expectation, not a verified fact, and I'd want the docket in hand before naming anyone.