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.
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.
Filing to Case Dismissed in 1439 days
1,439 days — nearly 4 years, well above the W.D. Texas median for patent cases
Stipulated non-infringement: what the judgment means for both parties
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-infringementTMT 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 determinativeMedtronic 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 appealEndurant 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 appealFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | TMT Systems, Inc. | Company | Medical device IP holding entity — holder of US7101393B2 covering telescoping stent graft arm systemsSearch in Eureka ↗ |
| Co-Plaintiff | Timur P. Sarac | Individual | Search in Eureka ↗ |
| Defendant | Medtronic, Inc. | Company | Medtronic, Inc. — global medical device manufacturer, maker of Endurant stent graft familySearch in Eureka ↗ |
| Co-Defendant | Medtronic USA, Inc. | Company | Search in Eureka ↗ |
| Plaintiff counsel | Benjamin J. Reed | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Christopher D. Lynch | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Christopher J. Gaspar | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Daniel M. Perry | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | David C. Jonas | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | David I. Gindler | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Elizabeth L. DeRieux | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jasper Loc Tran | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Javier J. Ramos | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Jordan Fernandes | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Lauren Nicole Drake | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Leslie Irwin | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Marina Sosi Markarian | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Michael S. Scerbo | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Mollie Galchus | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Monica Grover | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Nathaniel T. Browand | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Nicholas Michael Fallah | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Rachel Wolf | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff counsel | S. Calvin Capshaw , III | Attorney | Counsel for TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Capshaw DeRieux LLP | Law Firm | Representing TMT Systems, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Milbank LLP | Law Firm | Representing TMT Systems, Inc.Search in Eureka ↗ |
| Defendant counsel | Aaron Macris | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Ahtoosa A. Dale | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Alexis Cohen | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Brian Lucas O’Gara | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Brittany Blueitt Amadi | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Chad B. Walker | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Courtney S. Block | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Gilbert T. Smolenski | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Gregory H. Lantier | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Helena Rachael Million-Perez | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | J. Stephen Ravel | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Jennifer Graber | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | John Kevin Myers , Jr | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Kelly Ransom | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Linda T. Coberly | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Rex A. Mann | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Samantha M. Lerner | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Thomas M. Melsheimer | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant counsel | Zoe A. Goldstein | Attorney | Counsel for Medtronic, Inc.Search in Eureka ↗ |
| Defendant law firm | Dorr LLP | Law Firm | Representing Medtronic, Inc.Search in Eureka ↗ |
| Defendant law firm | Kelly Hart & Hallman LLP | Law Firm | Representing Medtronic, Inc.Search in Eureka ↗ |
| Defendant law firm | Wilmer Cutler Pickering Hale & Dorr LLP | Law Firm | Representing Medtronic, Inc.Search in Eureka ↗ |
| Defendant law firm | Winston Strawn LLP | Law Firm | Representing Medtronic, Inc.Search in Eureka ↗ |
| Defendant law firm | Winston Strawn LLP (Chicago) | Law Firm | Representing Medtronic, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Alan D Albright | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
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.
US7101393B2 — Telescoping Arm Mechanism for Endovascular Stent Graft Delivery
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.
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.
Run a freedom-to-operate analysis on US7101393B2 to assess your product’s exposure
Run FTO in Eureka →Similar Endovascular Device Patent Cases in W.D. Texas & Federal Circuit
Cases involving stent graft, endovascular delivery, and medical device claim construction disputes in W.D. Texas and Federal Circuit — directly comparable to TMT v. Medtronic.
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.
TMT v Medtronic — key questions answered
The case closed on September 24, 2024 with a stipulated judgment of non-infringement of US7,101,393 in favour of Medtronic. The judgment was based entirely on the court’s construction of ‘telescoping arm’ and does not resolve patent validity. TMT expressly reserved the right to appeal all claim construction orders.
Trial began April 22, 2024 but resulted in a mistrial. Following the mistrial, the court held a post-trial claim construction hearing in June 2024 and issued a clarified construction of ‘telescoping arm’ in July 2024. That narrowed construction — requiring expansion and contraction along straight line segments — was determinative: under it, Medtronic’s Endurant devices could not infringe the asserted claims, leading to the stipulated judgment.
The accused products were Medtronic’s Endurant, Endurant II, Endurant II Aortic Extensions, Endurant II Aorto-uni-iliac (AUI), and Endurant IIs stent graft systems — all components of Medtronic’s endovascular aortic repair (EVAR) product family.
The judgment does not invalidate US7101393. Validity was never adjudicated — Medtronic’s invalidity counterclaims were dismissed without prejudice. The patent remains in force, and its scope against other parties or products depends on how a reviewing court, potentially the Federal Circuit on TMT’s appeal, ultimately construes ‘telescoping arm.’
The agreement that each party bears its own fees and costs suggests neither side achieved the litigation leverage typically required to pursue fee-shifting under 35 U.S.C. § 285. It is consistent with a negotiated resolution designed primarily to create an appealable final order rather than to resolve the underlying patent dispute on the merits — the real contest is expected to continue at the Federal Circuit.
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