DCT

4:26-cv-04216

ABC IP LLC v. Pembleton Sons' LLC

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 4:26-cv-04216, S.D. Tex., 05/27/2026
  • Venue Allegations: Venue is alleged to be proper as the Defendant resides in the district and has a regular and established place of business there.
  • Core Dispute: Plaintiffs allege that Defendant's "Super Safety" firearm trigger modification kits infringe five patents related to "forced reset trigger" mechanisms.
  • Technical Context: The technology domain is aftermarket firearm trigger systems, specifically "forced reset triggers," which use the firearm's cycle of operation to mechanically reset the trigger, potentially increasing the rate of semi-automatic fire.
  • Key Procedural History: The complaint alleges that the "FRT" trademark, which is also a subject of the dispute, has been in use by Plaintiff Rare Breed since at least 2020. No other significant procedural events are mentioned in the complaint.

Case Timeline

Date Event
2020-01-01 Approximate start of Plaintiff Rare Breed's use of FRT mark
2021-11-05 Priority date for U.S. Patent No. 12,031,784
2022-01-10 Priority date for U.S. Patent No. 12,636,403
2022-09-08 Priority date for U.S. Patent Nos. 12,038,247 and 12,578,159
2023-12-04 Priority date for U.S. Patent No. 12,529,538
2024-07-09 U.S. Patent No. 12,031,784 issues
2024-07-16 U.S. Patent No. 12,038,247 issues
2026-01-20 U.S. Patent No. 12,529,538 issues
2026-03-17 U.S. Patent No. 12,578,159 issues
2026-05-26 U.S. Patent No. 12,636,403 issues
2026-05-27 Complaint filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 12,038,247 - "Firearm Trigger Mechanism"

  • Patent Identification: U.S. Patent No. 12,038,247, "Firearm Trigger Mechanism," issued July 16, 2024.

The Invention Explained

  • Problem Addressed: The patent describes the limitations of standard semi-automatic triggers, where the rate of fire is constrained by the user's ability to manually release and reset the trigger for a subsequent shot ʼ247 Patent, col. 1:29-39 It also notes that prior methods for increasing fire rate, such as "bump firing," can be imprecise ʼ247 Patent, col. 1:41-54
  • The Patented Solution: The invention is a firearm trigger mechanism, adaptable as a "drop-in" module, featuring a three-position safety selector for "safe," "standard semi-automatic," and "forced reset semi-automatic" modes ʼ247 Patent, col. 2:23-40 In forced reset mode, a cam, which is pivoted by the reciprocating bolt carrier, actively "forces the trigger member to the set position" '247 Patent, col. 2:56-65 This allows a user to fire again immediately upon the action cycling, without needing to manually release the trigger ʼ247 Patent, col. 3:5-11
  • Technical Importance: The invention provides a user-selectable, mechanical means to achieve a faster rate of semi-automatic fire in widely used firearm platforms by automating the trigger reset process. ʼ247 Patent, col. 2:18-28

Key Claims at a Glance

  • The complaint asserts independent claim 15 Compl. ¶42
  • Essential elements of claim 15 include:
    • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam.
    • The mechanism is operable in a standard semi-automatic mode and a forced reset semi-automatic mode.
    • In standard mode, the disconnector hook catches the hammer hook, and a user must manually release the trigger member to free the hammer.
    • In forced reset mode, the cam is in a second position, and rearward movement of the bolt carrier causes the disconnector hook to be prevented from catching the hammer hook.
    • Thereafter, the bolt carrier moves forward, and the user can pull the trigger to fire the firearm.
  • The complaint reserves the right to assert other claims Compl. ¶40

U.S. Patent No. 12,031,784 - "Adapted Forced Reset Trigger"

  • Patent Identification: U.S. Patent No. 12,031,784, "Adapted Forced Reset Trigger," issued July 9, 2024.

The Invention Explained

  • Problem Addressed: The patent explains that prior forced reset trigger designs were often specific to one firearm pattern (e.g., an AR-15). Adapting them to other patterns with different bolt carrier geometries (e.g., an AR-10) created a dilemma: a locking member long enough to be actuated by the rear of the bolt carrier would interfere with the lower-sitting forward portion of the carrier as it cycled rearward, rendering the device inoperable ʼ784 Patent, col. 1:20-44
  • The Patented Solution: The invention is a trigger locking device with a "separately movable" upward extension ʼ784 Patent, abstract '784 Patent, col. 2:60-63 This extension is rigid enough to be actuated by the bolt carrier as it returns to battery but is also "deflectable" or hinged, allowing it to fold away and permit the forward part of the bolt carrier to pass over it without interference during rearward cycling ʼ784 Patent, col. 3:45-51 '784 Patent, FIG. 10
  • Technical Importance: This "one-way hinge feature" provides a solution to adapt forced reset trigger technology across different firearm platforms that have varying bolt carrier dimensions and profiles. ʼ784 Patent, col. 1:45-53

Key Claims at a Glance

  • The complaint asserts independent claim 1 Compl. ¶54
  • Essential elements of claim 1 include:
    • An extended trigger member locking device for a forced reset trigger mechanism.
    • A locking member movable between a first (locking) and second (unlocked) position.
    • The locking member has a body portion and an "upwardly extending deflectable portion that is separately movable relative to the body portion."
    • Actuating contact with a bolt carrier causes the locking member to move from the first to the second position.
  • The complaint reserves the right to assert other claims Compl. ¶54

U.S. Patent No. 12,529,538 - "Safety Mechanism for Firearm"

  • Patent Identification: U.S. Patent No. 12,529,538, "Safety Mechanism for Firearm," issued January 20, 2026.
  • Technology Synopsis: The patent discloses a safety mechanism centered on a "cam selector" with multiple recesses on its bottom side Compl. ¶25 A tail portion of the trigger interacts with these different recesses to enable three distinct modes of operation: a standard semi-automatic mode, an "active reset" mode where rotation of the cam selector forces the trigger to reset, and a safe mode that prevents the trigger from being pulled '538 Patent, abstract
  • Asserted Claims: At least independent claim 1 Compl. ¶68
  • Accused Features: The "Super Safety" product, which allegedly includes a multi-mode cam selector that interacts with a trigger to provide standard, active reset, and safe functionalities (Compl. ¶29; Compl. ¶¶32, 70).

U.S. Patent No. 12,578,159

  • Technology Synopsis: This patent describes a firearm trigger mechanism with selectable standard semi-automatic and forced reset semi-automatic modes Compl. ¶23 The invention uses a cam that is rotated by the cycling of the firearm's action to force the trigger member to reset, which prevents the trigger from being pulled again until the action has returned to battery '159 Patent, abstract This allows for an accelerated firing sequence compared to a standard trigger Compl. ¶23
  • Asserted Claims: At least independent claim 1 Compl. ¶82
  • Accused Features: The "Super Safety" product is accused of embodying this technology by providing both standard and forced reset modes of operation, using a cam to reset the trigger Compl. ¶29 Compl. ¶84

U.S. Patent No. 12,636,403

  • Technology Synopsis: This patent describes a trigger mechanism featuring a safety selector that allows a user to choose between two distinct modes: a standard semi-automatic mode and a forced reset semi-automatic mode Compl. ¶26 In the forced reset mode, the trigger is mechanically reset by the action, while in the standard mode, the user must manually reset it Compl. ¶26 '403 Patent, abstract
  • Asserted Claims: At least independent claim 38 Compl. ¶96
  • Accused Features: The "Super Safety" is accused of infringing by including a selector that allows the user to switch between a "disconnector mode" (standard semi-automatic) and a "forced reset semiautomatic" mode Compl. ¶32 Compl. ¶98

III. The Accused Instrumentality

Product Identification

The accused products are collectively identified as the "(3-Position) 'Super Safety'" Compl. ¶29

Functionality and Market Context

The complaint alleges the Super Safety is sold via the Trinity Trigger website in several forms, including as a "partial kit," a "complete kit," or pre-installed in a receiver or complete firearm Compl. ¶30 When installed, the device allegedly functions as a "forced reset trigger" mechanism that gives the user the ability to switch between a standard semi-automatic mode (termed "disconnector mode") and a "forced reset semiautomatic with cam" mode Compl. ¶32 The complaint provides a photograph of a "2 POS SUPER SAFETY" kit, suggesting it contains the core components of the accused mechanism Compl. ¶31 Plaintiffs allege the defendant's use of the "FRT" mark on other products is intended to trade on the goodwill of Plaintiffs' own "FRT" branded products Compl. ¶¶35-38

IV. Analysis of Infringement Allegations

'247 Patent Infringement Allegations

Claim Element (from Independent Claim 15) Alleged Infringing Functionality Complaint Citation Patent Citation
A firearm trigger mechanism comprising: a hammer ... a trigger member ... a disconnector ... and a cam... When installed, the Super Safety is alleged to be part of a forced reset trigger mechanism that functions as a cam. ¶42 col. 7:1-8
whereupon in a standard semi-automatic mode, ... said disconnector hook catches said hammer hook, ... at which time a user must manually release said trigger member to free said hammer from said disconnector ... The Super Safety is alleged to operate in a standard mode where the disconnector catches the hammer, requiring the user to manually release the trigger to reset and fire again. ¶42 col. 9:16-27
and whereupon in a forced reset semi-automatic mode, ... rearward movement of the bolt carrier causes rearward pivoting of said hammer such that said disconnector hook is prevented from catching said hammer hook, ... In forced reset mode, the accused mechanism is alleged to prevent the disconnector from catching the hammer hook during the bolt carrier's rearward movement. ¶42 col. 9:31-41
and thereafter the bolt carrier moves forward into battery, at which time the user can pull said trigger member to fire the firearm. After the bolt carrier returns to battery in forced reset mode, the user can allegedly pull the trigger to fire the firearm without first releasing it. ¶42 col. 9:55-61
  • Identified Points of Contention:
    • Technical Question: The complaint's infringement theory relies on plaintiff-generated diagrams, such as one illustrating the "Hammer Set Position" Compl. p. 14 A key evidentiary question for the court will be whether the actual, physical "Super Safety" product operates precisely as depicted in these renderings, particularly regarding the allegation that the mechanism "prevented" the disconnector from catching the hammer hook in forced reset mode.
    • Scope Question: The complaint asserts infringement by a product sold as a "kit" Compl. ¶30 The analysis may raise the question of whether the sale of a kit of parts constitutes direct infringement of a claim for a "firearm trigger mechanism," or if liability would primarily arise under theories of indirect (induced or contributory) infringement.

'784 Patent Infringement Allegations

Claim Element (from Independent Claim 1) Alleged Infringing Functionality Complaint Citation Patent Citation
In a forced rest trigger mechanism, an extended trigger member locking device, comprising: a locking member that is movable between a first position in which it locks a trigger ... and a second position where it does not restrict movement... The Super Safety is alleged to be part of a forced reset trigger mechanism and to function as an extended trigger member locking device, operating between a locked and unlocked position. ¶56 col. 2:53-58
the locking member ... including a generally upward extension portion configured to make actuating contact with a surface of a bolt carrier... The Super Safety is alleged to have an "upward extending portion (lever arm)" that makes contact with the bolt carrier. ¶56 col. 2:58-59
the locking member having a body portion that is movably supported and an upwardly extending deflectable portion that is separately movable relative to the body portion between an extended position and a deflected position. The complaint alleges the Super Safety operates as a locking member with an upward extending lever arm, as shown in a diagram of the "Locked First Position" (Compl. p. 27). ¶56 col. 2:60-63
  • Identified Points of Contention:
    • Technical Question: The central inventive concept of the '784 patent is the "separately movable" and "deflectable" nature of the upward extension, designed to avoid interference ('784 Patent, col. 1:45-53). A critical point of contention will be whether the accused "Super Safety" actually possesses this two-part, hinged, or one-way folding structure, or if it instead uses a single, rigid pivoting lever. The complaint's diagrams do not provide sufficient detail to resolve this technical question.
    • Scope Question: The claim requires the deflectable portion to be "separately movable relative to the body portion." Practitioners may dispute whether a single, unitary component that pivots as a whole relative to the firearm frame meets this limitation, or if it requires a multi-part assembly with internal, relative movement as shown in the patent's embodiments '784 Patent, FIGS. 2, 8

V. Key Claim Terms for Construction

  • '247 Patent, Claim 15

    • The Term: "...disconnector hook is prevented from catching said hammer hook"
    • Context and Importance: This term is critical because it defines the functional difference between the "standard" and "forced reset" modes. The infringement analysis will depend on whether the accused device actively and reliably prevents this engagement, or if engagement is merely avoided or made less likely. Practitioners may focus on this term because it is a negative limitation that could be subject to debate over the mechanism and certainty of the "prevention."
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The claim language itself does not specify the mechanism of prevention, which may support an interpretation that covers any method of stopping the hook from catching, whether by blocking, displacement, or timing.
      • Evidence for a Narrower Interpretation: The specification links this prevention to the safety selector, stating that in forced reset mode, the selector "prevents the disconnector 60 from pivoting with the trigger member 38 thus preventing the disconnector hook 64 from catching the hammer hook 53" '247 Patent, col. 8:55-60 This suggests the "prevention" is achieved by physically blocking the disconnector's movement, which could support a narrower construction.

  • '784 Patent, Claim 1

    • The Term: "...an upwardly extending deflectable portion that is separately movable relative to the body portion..."
    • Context and Importance: This term encapsulates the core novelty of the patent, intended to solve the geometric interference problem in prior art. The entire infringement case for this patent may hinge on whether the accused product's locking member has a component that is "separately movable" from its main body.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: A defendant might argue that "separately movable" simply means the extension portion and body portion are distinct parts that can move, even if they pivot on the same axis or are part of a larger assembly that moves together relative to the firearm's frame.
      • Evidence for a Narrower Interpretation: The specification repeatedly emphasizes a two-part construction where the extension pivots relative to the body on its own pin ('784 Patent, col. 3:41-45, FIG. 2) or is otherwise hinged to allow it to "fold on the pivot pin 24 and allow the bolt carrier 16 to pass without causing pivotal movement of the locking member body 26" '784 Patent, col. 3:63-66 This strongly suggests "separately movable" requires movement independent of the main body's locking/unlocking pivot.

VI. Other Allegations

  • Indirect Infringement: For each of the five asserted patents, the complaint alleges both induced and contributory infringement. The inducement allegations are based on Defendant's alleged advertising, promotion, and instructions on how to install and use the Super Safety Compl. ¶43 Compl. ¶57 Compl. ¶71 Compl. ¶85 Compl. ¶99 The contributory infringement allegations are based on the sale of components, such as the "cam or cam lever arm," which are alleged to be specially designed for an infringing use and not suitable for substantial non-infringing use Compl. ¶45 Compl. ¶59 Compl. ¶73 Compl. ¶87 Compl. ¶101
  • Willful Infringement: The complaint alleges willful infringement for all five patents, asserting that Defendant knew or should have known its actions constituted infringement and that it could not have formed a reasonable belief that its actions were non-infringing or that the patents were invalid Compl. ¶46 Compl. ¶60 Compl. ¶74 Compl. ¶88 Compl. ¶102

VII. Analyst's Conclusion: Key Questions for the Case

  • Structural Equivalence: A key evidentiary question will be one of structural equivalence: does the accused "Super Safety" product physically embody the specific mechanical solutions claimed in the patents? This is particularly salient for the '784 patent's requirement of a "separately movable" and "deflectable" extension, a feature designed to solve a specific geometric problem that may or may not be present in the accused device.
  • Functional Interpretation: The case will likely involve a significant battle over functional interpretation during claim construction. A core issue will be defining the scope of terms like "forces" '247 Patent and "prevented from catching" '247 Patent The court's interpretation of whether these terms require a specific type of active, physical blocking versus a more general biasing or avoidance will be critical to the infringement outcome.
  • Contributory Liability: Given that the accused product is sold as a "kit" of components Compl. ¶30, a central legal question will be one of contributory liability. The analysis will likely focus on whether the components of the "Super Safety" kit, such as the cam and lever, have a substantial non-infringing use, or if they are, as Plaintiffs allege, specially designed and adapted only for the infringing purpose of creating a forced reset trigger mechanism.
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