Tiger Tool v. Yin Le: King Pin Press Patent Infringement Case Dismissed

Introduction

A patent infringement action centered on specialized heavy-duty truck tooling ended in a joint voluntary dismissal on January 26, 2026, when Tiger Tool International Incorporated and defendant Yin Le filed a stipulated dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(ii) in the U.S. District Court for the Eastern District of New York. Case No. 1:24-cv-04241 involved U.S. Patent No. US9511488B2, covering a king pin press tool for medium and heavy-duty trucks, and accused Yin Le of infringing that patent through a competing king pin removal product.

The case ran 591 days from its June 14, 2024 filing before closing without a merits adjudication, with each party bearing its own costs and fees. While the dismissal leaves no binding precedent on validity or infringement, the litigation arc offers meaningful strategic signals for patent holders and accused infringers operating in the specialized automotive tooling space—and for IP professionals monitoring how niche industrial equipment patents are asserted and resolved in federal district courts.

Case Overview

The Parties

The Patent at Issue

This case involved a utility patent covering a mechanical apparatus critical for heavy-duty truck maintenance:

• • US9511488B2 (Application No. US14/282212) — Mechanical press tools for king pin removal/installation on commercial trucks.

The patent claims mechanical press apparatus configurations that enable controlled force application in confined truck chassis environments, addressing the operational complexity of king pin service procedures.

Legal Representation

Plaintiff Tiger Tool was represented by David M. Magee, Karl Thomas Fisher, and Maura Eileen Miller of **Greenberg Traurig LLP**. Defendant Yin Le was represented by Mark Berkowitz and Sandra Adele Hudak of **Tarter Krinsky & Drogin LLP**. The disparity in firm size and reach is a notable strategic data point in this niche industrial IP dispute.

Litigation Timeline & Procedural History

Tiger Tool filed suit in the Eastern District of New York — a venue that handles a substantial volume of commercial IP matters and offers an experienced federal judiciary for patent disputes. The case ran approximately 19.7 months, a duration consistent with early-to-mid-stage resolution before trial, likely reflecting settlement negotiations that concluded prior to significant Markman claim construction proceedings or summary judgment briefing.

Specific procedural milestones — including motions practice, claim construction orders, or expert disclosures — were not detailed in the available case record. The first-instance district court designation confirms no appellate proceedings were initiated. The 591-day duration, ending in mutual voluntary dismissal, suggests the parties reached a private resolution, the terms of which were not disclosed in the public filing.

The Verdict & Legal Analysis

Outcome

The case was dismissed pursuant to **Fed. R. Civ. P. 41(a)(1)(A)(ii)** — a joint stipulation of dismissal signed by all appearing parties. The order specified that **all claims were dismissed with each party bearing its own costs and fees**. No damages award, injunctive relief, or consent judgment was entered on the public record.

Critically, Rule 41(a)(1)(A)(ii) dismissals carry **no preclusive effect** on the merits. The patent’s validity was neither confirmed nor invalidated; infringement was neither established nor adjudicated. This procedural posture is important for practitioners tracking this patent’s enforceability going forward.

Verdict Cause Analysis

The action was filed as a standard **patent infringement action**. Without disclosed claim construction rulings or motion decisions, the litigation record does not reveal which legal theories — literal infringement, doctrine of equivalents, or validity challenges under 35 U.S.C. §§ 102, 103, or 112 — drove the ultimate resolution. The mutual “bear own costs” provision suggests neither party achieved a decisive procedural advantage compelling a favorable financial settlement, or alternatively, that a confidential licensing arrangement or business resolution was reached privately.

The involvement of Greenberg Traurig on plaintiff’s side signals a well-resourced enforcement effort, while defendant’s retention of experienced New York IP litigation counsel at Tarter Krinsky & Drogin indicates the defense was not uncontested. The absence of default judgment proceedings confirms active defense participation throughout.

Legal Significance

Because the dismissal was stipulated and without prejudice to merits findings, US9511488B2 remains an active, enforceable patent asset for Tiger Tool. The case neither strengthens nor weakens the patent’s presumption of validity under 35 U.S.C. § 282. Patent practitioners should note that this outcome leaves Tiger Tool free to assert the same patent against other parties — including potentially the same defendant — without res judicata barriers.