ABC IP LLC v. Mist Distributors LLC

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: ABC IP, LLC (Delaware); Rare Breed Triggers, INC. (Texas); RBTM LLC (Wyoming)
  • Defendant: Mist Distributors, LLC (Ohio); Arthur R. Thomson (Ohio)
  • Plaintiff's Counsel: Wood Herron & Evans LLP; Fish & Richardson P.C.
• Case Identification: 1:26-cv-00658, S.D. Ohio, 07/08/2026
• Venue Allegations: Venue is alleged to be proper in the Southern District of Ohio on the basis that Defendants reside in the district and have a regular and established place of business there.
• Core Dispute: Plaintiffs allege that Defendants' firearm trigger devices infringe four patents related to "forced reset" trigger mechanisms that can increase the semi-automatic rate of fire.
• Technical Context: The technology concerns firearm trigger mechanisms that use the energy from a firearm's cycling action to mechanically reset the trigger, allowing for a faster firing sequence than is possible with standard semi-automatic triggers.
• Key Procedural History: The complaint states that Plaintiff ABC IP, LLC is the current owner of the asserted patents by assignment and that these assignments have been recorded with the U.S. Patent and Trademark Office.

Case Timeline

Date	Event
2020-01-01	Approximate date Plaintiffs' use of FRT trademark began
2021-11-05	U.S. Patent No. 12,031,784 Priority Date
2022-01-10	U.S. Patent No. 12,636,403 Priority Date
2022-09-08	U.S. Patent No. 12,038,247 Priority Date
2022-09-08	U.S. Patent No. 12,578,159 Priority Date
2024-07-09	U.S. Patent No. 12,031,784 Issue Date
2024-07-16	U.S. Patent No. 12,038,247 Issue Date
2026-03-17	U.S. Patent No. 12,578,159 Issue Date
2026-05-26	U.S. Patent No. 12,636,403 Issue Date
2026-07-08	Complaint Filing Date

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

U.S. Patent No. 12,038,247 - Firearm Trigger Mechanism, Issued July 16, 2024

The Invention Explained

• Problem Addressed: The patent's background section explains that in a standard semi-automatic firearm, a disconnector holds the hammer after firing until the user manually releases the trigger to reset the mechanism, which limits the potential rate of fire '247 Patent, col. 1:30-41 While devices to increase this rate exist, the patent states that "[f]urther improvement in forced reset triggers is desired" '247 Patent, col. 2:15-16
• The Patented Solution: The invention is a trigger mechanism with a three-position safety selector that allows for operation in a "safe" mode, a "standard semi-automatic" mode, and a "forced reset semi-automatic" mode '247 Patent, abstract In the forced reset mode, the rearward movement of the firearm's bolt carrier actuates a cam, which in turn forces the trigger member back to its set position '247 Patent, abstract The safety selector is configured to prevent the disconnector from catching the hammer in this mode, which allows the user to fire again immediately upon the bolt's return to battery without first manually releasing the trigger '247 Patent, abstract '247 Patent, col. 3:1-12
• Technical Importance: This design enables a user to achieve a significantly faster rate of semi-automatic fire by using the firearm's cycling action to perform the trigger reset function that the user would otherwise have to perform manually '247 Patent, col. 2:18-28

Key Claims at a Glance

• The complaint asserts independent claim 15 Compl. ¶38
• Claim 15 of the '247 Patent recites the following essential elements:
  • A firearm trigger mechanism comprising a hammer, a trigger member, a disconnector, and a cam.
  • The cam is movable between a first position and a second position, where in the second position a cam lobe forces the trigger member towards its set position.
  • In a "standard semi-automatic mode," the cam is in the first position, rearward bolt movement causes the disconnector to catch the hammer, and the user must manually release the trigger to fire.
  • In a "forced reset semi-automatic mode," the cam is in the second position, rearward bolt movement causes the disconnector hook to be prevented from catching the hammer hook, allowing the user to pull the trigger to fire again.
• The complaint reserves the right to assert other claims Compl. ¶38

U.S. Patent No. 12,031,784 - Adapted Forced Reset Trigger, Issued July 9, 2024

The Invention Explained

• Problem Addressed: The patent identifies a compatibility problem with forced reset triggers across different firearm platforms, such as the AR-15 and AR-10 '784 Patent, col. 1:21-32 Due to different dimensions, a trigger locking member long enough to be actuated by the bolt carrier in one platform (e.g., AR-10) could physically interfere with the bolt carrier's movement as it cycles in another platform '784 Patent, col. 1:36-44
• The Patented Solution: The patent discloses a trigger locking device featuring a "deflectable extension" '784 Patent, abstract This extension has a body portion and an "upwardly extending deflectable portion that is separately movable" '784 Patent, col. 6:4-7 This design allows the extension to be long enough to be actuated by the bolt carrier but also to "give way (i.e., deflect or fold)" to avoid interference when the forward portion of the bolt carrier passes over it during its rearward cycle '784 Patent, col. 2:6-10 '784 Patent, Fig. 10
• Technical Importance: This approach provides a versatile design, allowing a forced reset trigger mechanism to be compatible with multiple firearm platforms that have different geometric specifications and clearances between the bolt carrier and the fire control group '784 Patent, col. 1:21-44

Key Claims at a Glance

• The complaint asserts independent claim 1 Compl. ¶52
• Claim 1 of the '784 Patent recites the following essential elements:
  • In a forced reset trigger mechanism, an extended trigger member locking device comprising a locking member.
  • The locking member is movable between a locked first position and an unlocked second position.
  • It includes an upward extension configured to make "actuating contact" with a bolt carrier, causing the member to move from the first to the second position.
  • The locking member has a movably supported body portion and an upwardly extending deflectable portion.
  • The deflectable portion is "separately movable relative to the body portion" between an extended and a deflected position.
• The complaint reserves the right to assert other claims Compl. ¶52

U.S. Patent No. 12,578,159 - Firearm Trigger Mechanism, Issued March 17, 2026

• Technology Synopsis: This patent discloses a firearm trigger mechanism operable in either a "standard semi-automatic mode" or a "forced reset semi-automatic mode" '159 Patent, abstract Like the '247 Patent, it describes using the firearm's reciprocating bolt to mechanically reset the trigger, thereby allowing for an increased rate of fire '159 Patent, abstract Compl. ¶23
• Asserted Claims: The complaint asserts independent claim 1 Compl. ¶66
• Accused Features: The complaint alleges that the accused "FRB" device, through its dual-mode functionality, embodies the technology claimed in the '159 Patent Compl. ¶27 Compl. ¶66

U.S. Patent No. 12,636,403 - Firearm Trigger Mechanism, Issued May 26, 2026

• Technology Synopsis: This patent describes a firearm trigger mechanism featuring a selector that allows the user to choose between a "standard disconnector semiautomatic mode" and a "forced reset" semiautomatic mode Compl. ¶25 '403 Patent, abstract The invention details the interaction of a locking member and a safety selector to enable these two distinct operational modes, one requiring a manual trigger release to reset and the other providing an automatic, forced reset '403 Patent, abstract
• Asserted Claims: The complaint asserts independent claims 38 and 54 Compl. ¶80
• Accused Features: The accused "FRB" device is alleged to infringe by incorporating a mechanism that can switch between a standard mode and a "forced reset" mode using a selector, as claimed in the '403 Patent Compl. ¶30 Compl. ¶80

III. The Accused Instrumentality

Product Identification

• The accused products are identified as the "FRB device" ("the FRB") and are offered for sale under various names, including "FRB DRIPP STICK- GOLD Series," "FRB: Drip Drop-Goldie Series," and "FRB Drop-In Enhanced Reset Trigger Assembly" Compl. ¶27 Compl. ¶29

Functionality and Market Context

• The complaint alleges that the FRB is a "forced reset" trigger mechanism that embodies the technology claimed in the asserted patents Compl. ¶22 Compl. ¶27
• The FRB allegedly operates in at least two modes: a "disconnector mode" similar to a standard AR-15 trigger and a "forced reset" mode, with the user able to switch between them by rotating the safety selector Compl. ¶30
• Defendants are accused of making, using, and selling the FRB via their website Compl. ¶27 Compl. ¶28 The complaint includes a screenshot from the Defendants' website showing the "FRB DRIPP STICK- GOLD Series- Drop In Enhanced Reset Device" for sale Compl. ¶29, p. 7
• The complaint provides plaintiff-generated renderings to illustrate the alleged internal operation of the FRB device, showing how its components correspond to the elements of the asserted patent claims Compl. ¶40, p. 15 These renderings depict the interaction of the hammer, trigger, disconnector, and a cam-like component within a firearm receiver.

IV. Analysis of Infringement Allegations

12,038,247 Patent Infringement Allegations

Claim Element (from Independent Claim 15)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A firearm trigger mechanism comprising: a hammer having a sear catch and a hook for engaging a disconnector...	The FRB is installed in a fire control mechanism pocket with a hammer (red) that has a sear catch and a hook for engaging a disconnector.	¶40	col. 7:45-48
a trigger member having a sear...	The FRB is installed with a trigger member (brown) that has a sear and pivots.	¶40	col. 7:50-57
said disconnector having a hook for engaging said hammer...	A disconnector (orange) is included with a hook for engaging the hammer.	¶40	col. 8:1-7
and a cam having a cam lobe...	The FRB includes a cam (green) with a cam lobe and lever.	¶40	col. 8:8-19
said cam being movable between a first position and a second position, in said second position said cam lobe forces said trigger member towards said set position,	The cam is alleged to be movable between two positions, with the second position causing the cam lobe to move the trigger member toward the set position via a link.	¶40	col. 3:1-12
whereupon in a standard semi-automatic mode... a user must manually release said trigger member to free said hammer from said disconnector...	In standard mode, the cam is in the first position, and the user must manually release the trigger to free the hammer from the disconnector.	¶40	col. 9:1-26
whereupon in a forced reset semi-automatic mode, said cam is in said second position, rearward movement of the bolt carrier causes rearward pivoting of said hammer such that said disconnector hook is prevented from catching said hammer hook... at which time the user can pull said trigger member to fire the firearm.	In forced reset mode, the cam is in the second position, and rearward movement of the bolt carrier allegedly prevents the disconnector hook from catching the hammer hook, allowing the user to fire again.	¶40	col. 9:27-67

Identified Points of Contention

• Technical Question: The complaint's infringement theory relies heavily on "Plaintiff-generated renderings" to show the internal workings of the accused FRB device Compl. ¶40, p. 15 A central evidentiary question will be whether these color-coded diagrams accurately represent the structure and function of the actual FRB product, as this will be critical to proving that the device operates in the specific manner required by the claim's "standard" and "forced reset" clauses.
• Scope Question: Claim 15 recites a very specific sequence of events for both the standard and forced reset modes. The analysis may focus on whether the accused FRB device performs every step of these sequences, particularly whether the disconnector is "prevented from catching said hammer hook" in the forced reset mode in the precise way contemplated by the patent.

12,031,784 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
In a forced reset trigger mechanism, an extended trigger member locking device, comprising: a locking member that is movable between a first position... and a second position...	The FRB is alleged to function as an extended trigger member locking device, with a locking member (yellow, blue, and purple) movable between a locked first position and an unlocked second position.	¶54	col. 3:27-34
the locking member configured to be movably supported by a frame...	The FRB is movably supported by a frame/housing (purple).	¶54	col. 3:27-29
and including a generally upward extension portion configured to make actuating contact with a surface of the bolt carrier, such actuating contact causing the locking member to move from the first position to the second position,	The FRB has an upward extending portion ("lever arm," yellow) that makes actuating contact with the bolt carrier, causing the locking member to move from the first to the second position.	¶54	col. 3:39-44
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 FRB is alleged to have a body portion (blue) and an upwardly extending deflectable portion ("lever arm") that is separately movable relative to the body portion. A plaintiff-generated rendering shows the lever arm's separate travel Compl. ¶54, p. 32	¶54	col. 6:4-7

Identified Points of Contention

• Technical Question: The infringement analysis for the '784 Patent will likely concentrate on the physical construction of the accused FRB's locking member. The key factual question is whether its upward-extending "lever arm" is a distinct, "separately movable" component relative to its main body, as depicted in the complaint's diagrams Compl. ¶54, p. 32, or if it is a single, rigid piece that pivots as a monolithic unit.
• Scope Question: The dispute may center on the definition of "separately movable." Does this term require a distinct mechanical pivot, as shown in the patent's embodiments '784 Patent, Figs. 2, 8, or could it be construed more broadly to cover a component that merely flexes or bends relative to its base?

V. Key Claim Terms for Construction

For the '247 Patent

• The Term: "forced reset semi-automatic mode"
• Context and Importance: This term is central to the '247 patent and is defined by a specific sequence of functional outcomes recited in Claim 15. Practitioners may focus on this term because its construction will determine whether the second operational mode of the accused FRB device, as alleged by Plaintiffs, falls within the claimed invention. The dispute will likely involve a step-by-step comparison of the accused device's function against the functional limitations that define this mode in the claim.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The abstract describes the concept more generally as a mode where "rearward movement of the bolt carrier causes rearward pivoting of the hammer and pivoting of the cam... such that a cam lobe forces the trigger member to the set position" '247 Patent, abstract
  • Evidence for a Narrower Interpretation: Claim 15 itself provides a highly structured, multi-part definition, requiring that in this 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" '247 Patent, col. 10:55-65 This specific functional outcome of preventing the disconnector from catching the hammer is a critical part of the claimed mode.

For the '784 Patent

• The Term: "separately movable"
• Context and Importance: The interpretation of "separately movable" is critical for determining infringement of the '784 patent. Plaintiffs allege the accused device has a locking member with a deflectable portion that is "separately movable" from its body, while Defendants may argue their device is a single, pivoting component. The case may turn on whether the accused device's lever arm has the claimed independent motion.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The specification uses flexible language, stating the extension can "deflect or fold" '784 Patent, col. 2:49-50 and that it is designed to "give way" '784 Patent, col. 2:7, which might support a construction that includes material flexion, not just a mechanical pivot.
  • Evidence for a Narrower Interpretation: The patent's primary embodiments explicitly show a "foldable extension portion" that pivots on a "transverse pivot pin" distinct from the pivot for the main body '784 Patent, col. 3:45-48 '784 Patent, Fig. 2 This suggests "separately movable" may require a distinct, mechanically separate component with its own axis of rotation.

VI. Other Allegations

Indirect Infringement

• The complaint alleges both induced and contributory infringement.
  • Inducement: Plaintiffs allege Defendants induce infringement by providing instructions and advertising that encourage customers to install and use the FRB device in an infringing manner Compl. ¶41 Compl. ¶55
  • Contributory: The complaint alleges that components of the FRB, such as the "cam or cam lever arm," are not suitable for substantial non-infringing use because they are specially designed to be used in a fire control unit to create the allegedly infringing "forced reset" mechanism Compl. ¶43 Compl. ¶57

Willful Infringement

• The complaint alleges willful infringement, stating that Defendants "have known or should have known" that their actions constituted infringement of valid patents Compl. ¶44 Compl. ¶58 The pleading asserts that Defendants' belief of non-infringement or invalidity could not be reasonably or subjectively held, and that there is an "objectively high likelihood" of infringement, tracking the language of post-Halo willfulness standards Compl. ¶44

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

• A core issue will be one of factual correspondence: Do the Plaintiff-generated technical renderings presented in the complaint accurately depict the structure and mechanical operation of the Defendants' actual "FRB" products? The resolution of this evidentiary question will be foundational for the entire infringement analysis across all four patents.
• A second key issue will be one of definitional scope: Can the term "separately movable" in the '784 patent, which is illustrated in embodiments with a distinct mechanical pivot, be construed to read on the alleged operation of the accused device's lever arm? This will require the court to determine whether the term requires a separate component or can also cover flexion within a single-piece design.
• A final central question will be one of functional equivalence: Does the accused device's second mode of operation meet every functional limitation of the "forced reset semi-automatic mode" as strictly defined in the asserted claims of the '247, '159, and '403 patents, particularly the specific interactions between the cam, trigger, and disconnector during the firing cycle?