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TMT Systems v. Medtronic: Stent Graft Patent Infringement Dispute | PatSnap
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Case ID6:20-cv-00973
FiledOct 2020
ClosedSep 2024
Patent Litigation

TMT Systems v. Medtronic: Non-Infringement Judgment After Mistrial and Four-Year Claim Construction Battle

TMT Systems and inventor Timur P. Sarac sued Medtronic over US7,101,393, asserting the Endurant stent graft family infringed telescoping arm claims. After a mistrial in April 2024 and a pivotal post-trial claim construction order, the parties stipulated to non-infringement — a case spanning 1,439 days before Judge Alan D. Albright in the Western District of Texas.

Resolution time
1439days
1,439 days — nearly 4 years, well above the W.D. Texas median for patent cases
Patents asserted
1
US7101393B2 — telescoping arm mechanism for endovascular stent graft delivery systems
Outcome
Case Dismissed
Stipulated judgment of non-infringement entered; TMT’s appeal rights expressly preserved
Cost ruling
Each Party Bears Own Costs
No fee-shifting; both TMT and Medtronic agreed to bear their own fees and costs
Published by PatSnap Insights Team · Verified by PatSnap Eureka Data
Case overview

Claim Construction Defeats TMT’s Endurant Stent Graft Infringement Claims

TMT Systems, Inc. and inventor Timur P. Sarac filed suit against Medtronic, Inc. and Medtronic USA, Inc. in the Western District of Texas on October 16, 2020, asserting that Medtronic’s Endurant, Endurant II, Endurant II Aortic Extensions, Endurant II Aorto-uni-iliac, and Endurant IIs stent graft systems infringed claims 1, 2, 4, 10, 11, and 26 of U.S. Patent No. 7,101,393. The ‘393 patent covers telescoping arm technology central to endovascular stent graft delivery. Medtronic denied infringement and asserted invalidity defenses throughout.

The case turned decisively on the construction of the terms ‘telescoping arm’ and ‘telescoping arms.’ After initial claim construction in June 2022, a supplemental hearing in June 2023, a mistrial beginning April 22, 2024, and a post-trial claim construction hearing in June 2024, the court issued a July 2024 order defining ‘telescoping arm’ as ‘an arm capable of expanding and contracting along its straight line segment(s).’ Under that construction, the parties stipulated that Medtronic’s accused devices did not meet the claim limitation, and a final judgment of non-infringement was entered on September 24, 2024. Medtronic’s counterclaims were dismissed without prejudice.

The 1,439-day duration reflects an unusually protracted claim construction process — the court revisited the key term at least three times, including after a mistrial. The final narrowing construction of ‘telescoping arm’ appears to have been determinative: once the court clarified the plain-and-ordinary-meaning required segments sliding into each other, infringement could not be maintained. Critically, the stipulation expressly preserves TMT’s right to appeal all claim construction orders, leaving open the possibility that the Federal Circuit could revive the infringement claims if it adopts a broader construction.

Case at a glance
Case no.6:20-cv-00973
CourtTexas Western
JudgeAlan D Albright
FiledOctober 16, 2020
ClosedSeptember 24, 2024
Duration1439 days
OutcomeCase Dismissed
Verdict causeInfringement Action
BasisCase Dismissed
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Case data sourced from PACER / Texas Western District Court via PatSnap Eureka Litigation Intelligence Explore similar cases ↗
Case timeline

Filing to Case Dismissed in 1439 days

1,439 days — nearly 4 years, well above the W.D. Texas median for patent cases

Case timeline: Complaint filed OCT 16 2020, OCT–NOV — 1439 days total Horizontal timeline showing the three key events in TMT Systems, Inc. v Medtronic, Inc. from filing to resolution. Source: PACER, Texas Western District Court. OCT 16 2020 Complaint filed Pre-trial proceedings SEP 24 2024 Case Dismissed 1439 DAYS TOTAL
Dismissal terms

Stipulated non-infringement: what the judgment means for both parties

Legal mechanism

Stipulated judgment: non-infringement by claim construction

The parties entered a stipulated final judgment under which Medtronic was found not to infringe the asserted claims of US7101393 solely because the accused devices lack arms ‘capable of expanding and contracting along straight line segment(s).’ This is not a merits adjudication of invalidity — the judgment rests entirely on claim construction. Because the stipulation expressly preserves appeal rights, it functions as a consent judgment designed to create an immediately appealable final order, a recognised procedural mechanism in Federal Circuit practice.

Claim-construction-driven non-infringement
Patent holder outcome

TMT loses at trial level but retains full appellate rights

TMT Systems and Timur Sarac accepted non-infringement under the current construction but negotiated explicit preservation of all appeal rights, including the right to contest the claim construction orders and all other rulings. If the Federal Circuit adopts a broader interpretation of ‘telescoping arm,’ the infringement question reopens. However, the commercial window matters: Medtronic’s Endurant platform has been on the market throughout the litigation, and any eventual reversal would need to address the damages period carefully.

Appeal pending; construction outcome determinative
Defendant outcome

Medtronic secures non-infringement judgment, counterclaims preserved

Medtronic obtained a judgment of non-infringement across all six asserted claims covering its Endurant stent graft family, removing immediate infringement liability. Importantly, Medtronic’s counterclaims — likely including invalidity and potentially unenforceability — were dismissed without prejudice, preserving Medtronic’s ability to reassert them if TMT’s appeal succeeds. The no-cost ruling means Medtronic absorbs its own litigation costs, suggesting neither party achieved the leverage needed to extract a cost-shifting award.

Non-infringement; counterclaims preserved for appeal
Commercial implications

Endurant line cleared for now — but Federal Circuit review looms

Medtronic’s Endurant stent graft products — a cornerstone of its aortic intervention portfolio — currently operate without injunction risk under US7101393. However, the litigation is not fully resolved: TMT’s preserved appeal means the Federal Circuit may yet rule on the scope of ‘telescoping arm’ in endovascular device claims. Companies developing next-generation stent graft or endovascular delivery systems with extensible arm mechanisms should monitor the appeal closely, as a broader construction could expand the patent’s reach across the sector.

Endurant cleared; FTO monitoring advised pending appeal
Legal analysis based on PACER docket records for case 6:20-cv-00973 and PatSnap Eureka litigation intelligence Search PatSnap Eureka ↗
Parties and representation

Full party and counsel information

RoleNameTypeDetail
PlaintiffTMT Systems, Inc.CompanyMedical device IP holding entity — holder of US7101393B2 covering telescoping stent graft arm systemsSearch in Eureka ↗
Co-PlaintiffTimur P. SaracIndividualSearch in Eureka ↗
DefendantMedtronic, Inc.CompanyMedtronic, Inc. — global medical device manufacturer, maker of Endurant stent graft familySearch in Eureka ↗
Co-DefendantMedtronic USA, Inc.CompanySearch in Eureka ↗
Plaintiff counselBenjamin J. ReedAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselChristopher D. LynchAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselChristopher J. GasparAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselDaniel M. PerryAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselDavid C. JonasAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselDavid I. GindlerAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselElizabeth L. DeRieuxAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselJasper Loc TranAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselJavier J. RamosAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselJordan FernandesAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselLauren Nicole DrakeAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselLeslie IrwinAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselMarina Sosi MarkarianAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselMichael S. ScerboAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselMollie GalchusAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselMonica GroverAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselNathaniel T. BrowandAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselNicholas Michael FallahAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselRachel WolfAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff counselS. Calvin Capshaw , IIIAttorneyCounsel for TMT Systems, Inc.Search in Eureka ↗
Plaintiff law firmCapshaw DeRieux LLPLaw FirmRepresenting TMT Systems, Inc.Search in Eureka ↗
Plaintiff law firmMilbank LLPLaw FirmRepresenting TMT Systems, Inc.Search in Eureka ↗
Defendant counselAaron MacrisAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselAhtoosa A. DaleAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselAlexis CohenAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselBrian Lucas O’GaraAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselBrittany Blueitt AmadiAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselChad B. WalkerAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselCourtney S. BlockAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselGilbert T. SmolenskiAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselGregory H. LantierAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselHelena Rachael Million-PerezAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselJ. Stephen RavelAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselJennifer GraberAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselJohn Kevin Myers , JrAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselKelly RansomAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselLinda T. CoberlyAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselRex A. MannAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselSamantha M. LernerAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselThomas M. MelsheimerAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant counselZoe A. GoldsteinAttorneyCounsel for Medtronic, Inc.Search in Eureka ↗
Defendant law firmDorr LLPLaw FirmRepresenting Medtronic, Inc.Search in Eureka ↗
Defendant law firmKelly Hart & Hallman LLPLaw FirmRepresenting Medtronic, Inc.Search in Eureka ↗
Defendant law firmWilmer Cutler Pickering Hale & Dorr LLPLaw FirmRepresenting Medtronic, Inc.Search in Eureka ↗
Defendant law firmWinston Strawn LLPLaw FirmRepresenting Medtronic, Inc.Search in Eureka ↗
Defendant law firmWinston Strawn LLP (Chicago)Law FirmRepresenting Medtronic, Inc.Search in Eureka ↗
Presiding judgeJudge Alan D AlbrightJudgeTexas Western District CourtSearch in Eureka ↗
Official verdict

Official order — verbatim text

“WHEREAS, Plaintiffs TMT Systems, Inc. and Timur P. Sarac (“TMT”) alleged that Defendant Medtronic, Inc. (“Medtronic”) infringed claims 1, 2, 4, 10, 11, and 26 of U.S. Patent No. 7,101,393 (ECF Nos. 1, 21, 37, 138, 177); WHEREAS, Medtronic answered, denied that it infringed the claims of the ’393 patent, and asserted various affirmative defenses, including a defense of invalidity (ECF Nos. 283); WHEREAS, on June 3, 2022, the Court issued an Order, construing the terms “telescoping arm” and “telescoping arms” to have its plain and ordinary meaning (ECF No. 348); WHEREAS, the Court held a supplemental claim construction hearing on June 28, 2023; WHEREAS, on July 22, 2023, the Court issued an Order, ruling there is no new construction of the terms “telescoping arm” and “telescoping arms” and maintaining the plain and ordinary meaning construction (ECF No. 198); WHEREAS, starting on April 22, 2024, a trial was conducted that resulted in a mistrial (ECF Nos. 306, 312); WHEREAS, on May 23, 2024, the parties filed letter briefs regarding additional claim Case 6:20-cv-00973-ADA Document 355 Filed 09/24/24 Page 1 of 5 2 construction disputes (ECF Nos. 325, 326); WHEREAS, the Court held a post-trial claim construction hearing on June 27, 2024; WHEREAS, on July 22, 2024, the Court issued a Post-Trial Claim Construction Order, construing the term “telescoping arm” to have its plain and ordinary meaning, wherein the plain and ordinary meaning is “an arm that is capable of expanding and contracting along its straight line segment(s)” and the term “telescoping arms” to have its plain and ordinary meaning, wherein the plain and ordinary meaning is “more than one telescoping arm.” (ECF No. 348); NOW, THEREFORE, to preserve judicial and party resources and permit appellate review of the Court’s Orders, the parties stipulate and agree as follows: 1. Under the Court’s construction of the terms “telescoping arm” and “telescoping arms” in the Post-Trial Claim Construction Order, Medtronic has not infringed claims 1, 2, 4, 10, 11, and 26 of the ’393 patent because the accused devices do not have “[arms] that can lengthen by multiple segments sliding into (or out of) each other.” 2. The parties stipulate to the entry of judgment of non-infringement of claims 1, 2, 4, 10, 11, and 26 of the ’393 patent, subject to TMT’s forthcoming appeal. Nothing in this Stipulation and Order limits or restricts TMT’s or Medtronic’s rights to appeal, rights on appeal, or rights against the opposing party if the Court’s current determination of non-infringement is vacated or reversed. The parties expressly reserve the right to appeal the Court’s constructions of other claim terms in its Claim Construction Orders as well as the Court’s other Orders, including (for example) the Court’s statements and rulings during the hearings and at trial. 3. Medtronic’s counterclaims filed in this action are hereby dismissed without prejudice. Medtronic reserves all rights in its counterclaims and defenses. TMT’s reserves all rights in its defenses to Medtronic’s counterclaims. Case 6:20-cv-00973-ADA Document 355 Filed 09/24/24 Page 2 of 5 3 4. Each of TMT and Medtronic agrees to bear its own fees and costs in this action. 5. A proposed final judgment reflecting this stipulation of non-infringement and terminating this action is submitted herewith.”
Source: PACER Docket, Case 6:20-cv-00973, Texas Western District Court

The stipulated judgment is narrowly constructed: non-infringement is conceded solely under the court’s specific construction requiring arms that expand and contract along straight line segments — not as a general admission. Both parties explicitly reserved all appeal and remand rights, meaning this judgment functions as a consent order engineered for Federal Circuit review. The dismissal without prejudice of Medtronic’s counterclaims is notable: invalidity of US7101393 remains unresolved, and those defenses can be revived if the appeal succeeds. The mutual cost-bearing provision suggests neither party held dominant leverage at resolution.

PACER case 6:20-cv-00973 · Public docket record Explore in Eureka ↗
Patent at issue

US7101393B2 — Telescoping Arm Mechanism for Endovascular Stent Graft Delivery

Publication No.US7101393B2
Application No.US10/624864
Patent details
ProductTelescoping arm mechanism for endovascular stent graft delivery and deployment systems
Cited in actionOctober 16, 2020

US7,101,393 (application number US10/624864) covers a telescoping arm architecture used in the delivery and deployment of endovascular stent grafts. The patent’s asserted claims — 1, 2, 4, 10, 11, and 26 — centre on arms capable of expanding and contracting, a mechanical feature essential to navigating and deploying prosthetic grafts within aortic anatomy. The claim construction battle in this case ultimately defined ‘telescoping arm’ as requiring expansion and contraction along straight line segments, a narrower reading than TMT originally advanced.

The ‘393 patent sits in a technically sensitive area: endovascular aortic repair (EVAR) is a multi-billion-dollar global market, and Medtronic’s Endurant platform is among its leading products. A broadly construed ‘telescoping arm’ claim could theoretically reach a wide range of extensible delivery mechanisms used across the EVAR competitive set. The final narrowing construction limits near-term enforceability, but the patent’s validity was never adjudicated — making it a continued watch item for competitors developing new stent graft delivery architectures pending Federal Circuit resolution.

Patent data sourced from USPTO via PatSnap Eureka patent database Search patent records in Eureka ↗
Freedom to operate

Should you run an FTO against US7101393B2 in your stent graft program?

Any company developing or commercialising endovascular stent graft delivery systems incorporating extensible or retractable arm mechanisms should treat US7101393 as an active FTO concern. Although Medtronic prevailed on non-infringement under the current construction, TMT’s preserved appeal means the Federal Circuit may widen the claim scope. Developers of aortic, thoracic, or peripheral endovascular delivery devices with telescoping, articulating, or sliding arm components are particularly exposed if the appellate court adopts a broader functional interpretation.

PatSnap Eureka’s FTO Search Agent can map your device’s arm mechanism against the full claim landscape of US7101393 and its family, flag prosecution history estoppel limits on claim scope, and track the Federal Circuit docket for any appeal filed by TMT. Eureka’s claim chart automation accelerates the clearance analysis from weeks to hours — critical when the legal scope of a foundational claim term remains in appellate flux.

PatSnap Eureka FTO Search

Run a freedom-to-operate analysis on US7101393B2 to assess your product’s exposure

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Related litigation

Similar Endovascular Device Patent Cases in W.D. Texas & Federal Circuit

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Strategic implications

What this case signals for the endovascular device IP landscape

A four-year, mistrial-marked battle over a single claim term illustrates how claim construction can be the decisive battleground in medical device patent litigation.

Claim construction is the entire case in highly technical medical device patents

TMT’s infringement theory survived four years and a mistrial before the court’s final clarification of ‘telescoping arm’ ended the case without a merits verdict. For patent prosecutors drafting claims covering mechanical delivery mechanisms in endovascular devices, precise functional language tied to structural definitions is essential — vague plain-meaning constructions invite prolonged, expensive construction battles.

Preserved appeal rights transform stipulated judgments into strategic tools

The parties used a stipulated non-infringement judgment with fully preserved appeal rights to manufacture a final, appealable order — bypassing the need for a second trial after the mistrial. This procedural strategy is increasingly common in the Federal Circuit pipeline and signals that the real dispute over US7101393 and the Endurant platform will be resolved at the appellate level, not in Waco.

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Mistrial claim construction riskFederal Circuit appeal trajectoryEndurant FTO landscape post-verdict
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Frequently asked questions

TMT v Medtronic — key questions answered

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Stay ahead of endovascular device IP risk — before the Federal Circuit rules

TMT’s preserved appeal means the scope of ‘telescoping arm’ claims in US7101393 remains legally unsettled. Run your FTO now and set up monitoring alerts so you know the moment the Federal Circuit issues its ruling.

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