US 12578159

An analysis of US Patent 12,578,159 reveals a firearm trigger mechanism with selectable firing modes. The patent is assigned to ABC IP LLC and was invented by Brian A. Blakley. There is active litigation associated with this patent family.

Patent Summary

• Title: Firearm trigger mechanism
• Assignee: ABC IP LLC
• Inventor: Brian A Blakley
• Filing Date: July 2, 2024 (Application US18/761,606)
• Issue Date: March 17, 2026
• Abstract: The patent describes a trigger mechanism for firearms, particularly AR-pattern rifles, featuring a three-position safety selector. The three positions are "safe," "standard semi-automatic," and "forced reset semi-automatic." In the standard mode, the firearm operates as a typical semi-automatic, requiring the shooter to release the trigger to reset the hammer and fire again. In the forced reset mode, the cycling of the bolt carrier assembly mechanically forces the trigger to its reset position, allowing for rapid firing without the need for the user to manually release the trigger. This is achieved through the interaction of a cam, the bolt carrier, and the trigger member, with the safety selector determining whether the disconnector engages the hammer.

Plain-Language Overview of Independent Claims

The patent includes several independent claims, each defining the invention in a slightly different way. In essence, they protect the core concept of a trigger mechanism with two distinct semi-automatic modes.

• Claim 1: This claim protects a firearm trigger mechanism that can operate in two modes. In the first mode (standard semi-automatic), after a shot is fired, a component called a disconnector catches the hammer, and the user must let go of the trigger to allow the mechanism to reset for the next shot. In the second mode (forced reset), the mechanism is configured so that the disconnector is prevented from catching the hammer. Instead, the rearward movement of the firearm's bolt forces the trigger assembly to reset automatically, allowing the user to fire again without manually releasing the trigger. This is facilitated by a movable cam that interacts with the trigger.

• Claim 6: This claim is similar to claim 1 but focuses on the cam's role in preventing the trigger from being pulled until the action is fully cycled. It describes a trigger mechanism with the same two selectable modes (standard semi-automatic and forced reset). In the forced reset mode, the action of the bolt cycling not only resets the trigger but also utilizes a cam to block the trigger from being pulled again until the bolt is fully in battery, preventing an out-of-battery firing.

• Claim 10: This claim also describes a trigger mechanism with two selectable modes. It emphasizes that in the forced reset mode, the movement of the bolt causes a cam to move, and this cam movement is what forces the trigger back into its set position, ready to fire again, while simultaneously preventing the disconnector from holding the hammer.

• Claim 14: This claim broadly covers a trigger mechanism with the two selectable firing modes. It specifies that in the standard semi-automatic mode, the disconnector catches the hammer and requires a manual trigger release to reset. In the forced reset mode, the disconnector is prevented from holding the hammer, allowing the user to fire again after the bolt cycles without a manual trigger release. It focuses on the combination of a hammer, trigger member, disconnector, and a movable cam that forces the trigger toward its set position.

• Claim 15: This claim uses more functional language ("means for"). It protects a trigger mechanism with a selector for standard semi-automatic and forced reset modes. In the standard mode, a "disconnector hook means" catches a "hammer hook means," requiring a manual trigger release. In the forced reset mode, the disconnector is prevented from holding the hammer, allowing for another shot after the action cycles. This is achieved via a cam that forces the trigger to reset.

• Claim 16: Similar to the others, this claim protects a trigger mechanism with two modes. In the standard semi-automatic mode, a "disconnector hook means" catches the hammer after firing. In the forced reset mode, the disconnector is prevented from catching the hammer. A key element is a cam that forces the trigger toward its set position, enabling the user to fire again once the bolt is back in battery.

• Claim 17: This claim describes the invention in terms of a "movable blocking means" (the disconnector). A user-operated mode selector determines whether this blocking means will prevent the hammer and trigger from re-engaging after a shot until the user releases the trigger (semi-automatic mode), or if it will be bypassed, allowing a cam to forcibly reset the trigger for immediate subsequent firing (forced reset mode).

• Claim 18: This claim focuses on the cam's action based on the selected mode. It protects a trigger mechanism where a cam is moved by the cycling of the firearm's action. In standard semi-automatic mode, the cam moves the trigger but not enough to fully reset it, requiring a manual release by the user. In the forced reset mode, the cam forces the trigger all the way to its set condition, enabling the next shot without a manual release. It includes a "selector means" to enable or disable this complete, forced reset.

Litigation Search

A search of the patent's "Family has litigation" section indicates legal disputes. Specifically, cases have been filed in the Texas Eastern District Court (Case numbers 2:26-cv-00030 and 2:26-cv-00033). This indicates that the validity or infringement of patents within this family, which includes US12578159, has been subject to legal challenges. A search of the CAFC 2026 dockets for this specific patent number yielded no results, which is expected as appeals would typically occur after district court proceedings conclude.

Litigation Status of U.S. Patent No. 12,578,159

As of May 1, 2026, research confirms that U.S. Patent No. 12,578,159 is asserted in at least two known litigation cases. The patent is part of a broader legal strategy by the patent holder, ABC IP, LLC, which is involved in numerous infringement suits across various jurisdictions concerning its forced-reset trigger technology.

Details of the specific cases involving patent 12,578,159 are as follows:

Case 1

• Case Number: 2:26-cv-00030
• Jurisdiction: U.S. District Court for the Eastern District of Texas, Marshall Division
• Plaintiff(s): ABC IP, LLC and Rare Breed Triggers, Inc.
• Defendant(s): MaRs Trigger, LLC and Peter Brennen
• Filing Date: January 12, 2026
• Status/Outcome: The case is currently active. The complaint alleges that the defendants' "Super Safety" firearm trigger mechanism infringes on four of the plaintiffs' patents, including the '159 patent. The plaintiffs are alleging willful infringement, citing a conference call in March 2025 where the defendant was purportedly notified of the infringement. The case has been assigned to Judge Rodney Gilstrap.

Case 2

• Case Number: 2:26-cv-00033
• Jurisdiction: U.S. District Court for the Eastern District of Texas
• Plaintiff(s): ABC IP LLC, et al.
• Defendant(s): Cope
• Filing Date: Unknown. The case is referenced in court filings related to other litigation involving ABC IP, LLC.
• Status/Outcome: The case is active, but specific details regarding the defendants and the current status are not available in the public search results. It is listed as a related matter in other patent infringement cases initiated by ABC IP, LLC.

These cases are part of a larger set of legal actions by ABC IP, LLC to enforce its patent portfolio related to firearm trigger mechanisms. No appeals to the Court of Appeals for the Federal Circuit (CAFC) for this specific patent have been identified, which is expected as the district court cases are still in their early stages.

Proceedings overview

As of May 31, 2026, there are no AIA trial proceedings on file for U.S. Patent 12,578,159 in the USPTO Open Data Portal. Web search also did not reveal any active or concluded PTAB proceedings for this patent. This suggests that the patent has not yet been challenged through Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) review. The bottom-line defensive posture for a defendant is that all claims of the patent are currently untested by the PTAB.

Strategic summary

Currently, all claims of US Patent 12,578,159 are untested by the PTAB. This means there are no canceled or sustained claims from PTAB proceedings, and the entire scope of the patent remains available for assertion by the patent owner, ABC IP LLC.

Without any PTAB proceedings, there is no estoppel landscape established under § 315(e)(2). Therefore, any defendant facing assertion of this patent would theoretically be free to raise any valid prior art grounds in a new IPR or PGR petition, provided they meet the statutory requirements and deadlines. The absence of PTAB activity could be a signal that the patent is relatively new, or perhaps that potential petitioners are still evaluating their strategies or choosing to challenge related patents in the family first.

Recommended next steps

If you are a defendant facing assertion of US Patent 12,578,159, and given the absence of any PTAB activity to date, it would be advisable to:

1. Conduct a thorough prior art search: Identify potential prior art references that could be used to challenge the patentability of the asserted claims under 35 U.S.C. §§ 102 and/or 103.
2. Evaluate filing an IPR petition: If strong prior art is found, consider filing an IPR petition to challenge the patentability of the claims. This would be a proactive measure to potentially invalidate the patent or narrow its scope. The one-year deadline for filing an IPR from service of a complaint should be carefully monitored.
3. Monitor related patent families: Keep an eye on any PTAB activity concerning related patents owned by ABC IP LLC, especially those concerning similar forced-reset trigger technology. Outcomes in those cases could provide valuable insights and potentially influence strategy for US12578159.

Inventors

• Brian A Blakley: Employer at the time of filing is not determinable from the provided patent text or associated information. The patent lists him as the inventor, but no employer is specified.

Original assignee

The original assignee named on the issued patent US12578159 is ABC IP LLC. It is unclear from the provided information whether ABC IP LLC ships a product embodying the claims or its primary line of business. The current status of ABC IP LLC is "Active," as indicated in the patent's legal status section.

Assignment timeline

As of May 31, 2026, a search of the USPTO Assignment Center for patent US12578159 reveals no recorded assignments for this patent. This typically means the original assignee, ABC IP LLC, still holds ownership of the patent.

Timeline diagram

timeline
    title Ownership of US 12578159
    2022 : Priority date 2022-09-08
    2024 : Filed by ABC IP LLC
    2026 : Issued to ABC IP LLC
         : Litigation initiated

NPE / troll-pattern signals

1. Shell-entity transfer — Not present. The patent is currently held by the original assignee, ABC IP LLC, and no transfers to entities with names suggesting shell operations have been recorded.
2. Known asserter in the chain — Unclear. While ABC IP LLC is a plaintiff in active litigation concerning this patent, it is not explicitly listed on the commonly cited public NPE lists (Acacia Research Corp, Marathon Patent Group, etc.) within the provided information. However, the litigation summary indicates they are involved in "numerous infringement suits across various jurisdictions," which is characteristic of an NPE.
3. Repeat correspondent across the chain — Not present. Since there are no recorded assignments, there is no chain of correspondents to analyze for recurrence.
4. Cascading transfers — Not present. No assignments have been recorded.
5. Pre-litigation transfer — Not present. No assignments have been recorded prior to the initiation of litigation in January 2026.
6. Bankruptcy fire-sale — Not present. No information suggests the original assignee has filed for bankruptcy or that the patent was sold in such proceedings.
7. Privateering — Unclear. Without more information on ABC IP LLC's relationship with other operating companies or details from SEC filings, it's unclear if this is a privateering arrangement.
8. Defensive aggregator (anti-NPE) — Not present. The patent has not been acquired by a defensive aggregator.

Verdict

NPE — moderate confidence. While there are no recorded assignments to explicitly named shell entities or known high-frequency NPEs in the USPTO Assignment Center, the ongoing and numerous infringement lawsuits initiated by ABC IP LLC, as detailed in the litigation summary, strongly suggest that ABC IP LLC operates as a patent asserting entity. This pattern of extensive litigation is a key characteristic of a Non-Practicing Entity (NPE). [cite: https://assignmentcenter.uspto.gov/]

To identify the most relevant prior art for US patent 12578159, I will examine the patent citations listed within the document itself, as these are typically deemed relevant by the patent examiner during prosecution. The current date is April 26, 2026.

Here are some of the cited prior art patents and their potential relevance to US12578159:

1. US 7,398,723 B1

• Full Citation: US 7,398,723 B1 to Blakley, Brian A., titled "Trigger forward displacement system and method."
• Publication/Filing Date: Filed: April 25, 2003; Patented: July 15, 2008.
• Brief Description: This patent describes a semi-automatic firearm trigger system that uses a pivoting cam, contacted by a rearwardly traveling bolt carrier, to press down on a trigger-extension, forcing the rear of the trigger down and the front of the trigger forward. This mechanism aims to increase the cyclic firing rate without classifying the firearm as a machine gun.
• Potential Anticipation: US 7,398,723 B1 is particularly relevant as it is invented by the same person, Brian A. Blakley, and also focuses on increasing the rate of semi-automatic fire through a trigger forward displacement system utilizing a pivoting cam actuated by the bolt carrier. This directly relates to the core mechanism of "forced reset" in US12578159. Therefore, it potentially anticipates aspects of all independent claims (Claims 1, 6, 10, 14, 15, 16, 17, 18) of US12578159, especially regarding the cam's interaction with the bolt carrier and trigger to achieve a reset. The description of US12578159 explicitly states that "Further improvement in forced reset triggers is desired" following the description of US 7,398,723 B1, indicating that the '723 patent forms a foundational basis for the improvements claimed in the '159 patent.

2. US 9,568,264 B2

• Full Citation: US 9,568,264 B2 to Graves, Thomas Allen, titled "Flex-fire technology."
• Publication/Filing Date: Filed: September 10, 2015; Patented: February 14, 2017. Claims priority to a provisional application filed September 11, 2014.
• Brief Description: This patent describes a semi-automatic arm with a reciprocating gun bolt that positively mechanically resets the trigger. The trigger can be blocked from depression until up to 99% of the operating cycle, preventing accidental firing. It focuses on reciprocating gun bolt driven trigger and integrated safety mechanisms.
• Potential Anticipation: This patent, along with others by Graves (US 9,816,772 and US 9,939,221), describes forcefully resetting the trigger with rigid mechanical contact between the trigger member and the bolt as the action cycles. This directly relates to the concept of a forced reset in US12578159. While US12578159 aims to be a "drop-in" solution for AR-pattern firearms without requiring a modified bolt carrier, and Graves' patents might require such modifications, the core concept of a bolt-driven forced reset could potentially anticipate aspects of all independent claims (Claims 1, 6, 10, 14, 15, 16, 17, 18) of US12578159.

3. US 9,816,772 B2

• Full Citation: US 9,816,772 B2 to Graves, Thomas Allen, titled "Flex-fire technology."
• Publication/Filing Date: Filed: September 10, 2015; Patented: November 14, 2017. This is a divisional of US 9,568,264.
• Brief Description: Similar to US 9,568,264, this patent describes a high energy trigger reset method and apparatus for semi-automatic arms, focusing on reciprocating gun bolt-driven trigger mechanisms. It includes features to block trigger depression until the gun bolt is nearly in battery.
• Potential Anticipation: As a related patent by Graves, it shares the core concept of a bolt-driven forced reset trigger. It could potentially anticipate aspects of all independent claims (Claims 1, 6, 10, 14, 15, 16, 17, 18) of US12578159 for similar reasons as US 9,568,264 B2.

4. US 9,939,221 B2

• Full Citation: US 9,939,221 B2 to Graves, Thomas Allen, titled "Flex-fire G2 technology."
• Publication/Filing Date: Filed: September 10, 2015; Patented: April 10, 2018.
• Brief Description: This patent further develops the "Flex-fire" technology, describing trigger-activated semi-automatic arms with high energy trigger reset and integrated safety mechanisms. It emphasizes preventing trigger depression except when the firearm is in battery or within a small percentage of forward gun bolt stroke.
• Potential Anticipation: This patent also focuses on forced reset through mechanical contact between the trigger and the bolt. It could potentially anticipate aspects of all independent claims (Claims 1, 6, 10, 14, 15, 16, 17, 18) of US12578159 due to the shared underlying principle of a bolt-actuated forced trigger reset.

5. US 10,514,223 B1

• Full Citation: US 10,514,223 B1 to Rounds, Jeffrey Cooper, titled "Firearm trigger mechanism."
• Publication/Filing Date: Filed: September 27, 2018; Patented: December 24, 2019.
• Brief Description: This patent describes a firearm trigger mechanism where the hammer, when displaced by the cycling of the bolt carrier, contacts a surface on the trigger member, forcing the trigger member to the set position. It also includes a locking bar that prevents early hammer release.
• Potential Anticipation: This patent is assigned to the same assignee, ABC IP, LLC, as US12578159. It introduces a mechanism where the hammer itself forces the trigger to the set position, and a locking bar prevents early hammer release. While the '159 patent specifically mentions a cam for forced reset, the overall goal of forced reset and preventing early hammer release is present in '223. This suggests that it could potentially anticipate aspects of claims 1, 6, 10, 14, 15, 16, 17, and 18, particularly regarding the forced reset of the trigger member and the prevention of early hammer release.

6. US 11,346,627 B1

• Full Citation: US 11,346,627 B1 to DeMonico, Lawrence, titled "Forced reset semiautomatic trigger with sliding blocking bar."
• Publication/Filing Date: Filed: February 8, 2022; Patented: May 31, 2022.
• Brief Description: This patent, also assigned to ABC IP, LLC, describes a trigger mechanism with a sliding locking bar that is actuated by the bolt carrier to move between a locked position (preventing trigger movement) and an unlocked position (allowing trigger movement). The hammer forces the trigger to its reset position.
• Potential Anticipation: This patent, like US 10,514,223 B1, is from the same assignee and details another forced reset trigger mechanism where the hammer forces the trigger to the set position, and a locking bar (here, a sliding one) prevents early hammer release. This also potentially anticipates aspects of all independent claims (Claims 1, 6, 10, 14, 15, 16, 17, 18) of US12578159 due to the shared objective of a bolt-actuated forced reset, even if the specific mechanical implementation (sliding blocking bar vs. pivoting cam and safety selector interaction) differs.

7. U.S. patent application Ser. No. 18/048,572

• Full Citation: U.S. patent application Ser. No. 18/048,572 filed Oct. 21, 2022.
• Publication/Filing Date: Filed: October 21, 2022.
• Brief Description: This application is cited in the background of US12578159 and is noted to also be from the assignee, ABC IP LLC. It relates to devices where "the hammer forces the trigger to the set position, and a locking bar prevents early hammer release."
• Potential Anticipation: As an earlier application from the same assignee describing a similar forced reset mechanism involving the hammer and a locking bar, it likely has overlapping subject matter with US12578159 and could potentially anticipate claims related to the general concept of forced reset and preventing early hammer release (Claims 1, 6, 10, 14, 15, 16, 17, 18).

8. U.S. Provisional Patent Application No. 63/374,941

• Full Citation: U.S. Provisional Patent Application No. 63/374,941.
• Publication/Filing Date: Filed: September 8, 2022.
• Brief Description: US12578159 claims priority to this provisional application. The provisional application itself is described as employing a pivoting cam arrangement with a three-position safety selector to provide safe, standard semi-automatic, and forced reset semi-automatic modes.
• Potential Anticipation: Since US12578159 claims priority to this provisional application, the provisional application would generally disclose the subject matter of the '159 patent. Therefore, it is highly likely that this provisional application anticipates all claims of US12578159, as the core features of the invention are already present in the provisional application.

It's important to note that the strength of anticipation would depend on the specific details and scope of each prior art reference in comparison to the explicit claim language of US12578159. The examiner likely considered these during prosecution, and the differences in the claims of US12578159 would have been argued as distinguishing features.

Obviousness Analysis of US Patent 12,578,159 under 35 U.S.C. § 103

This analysis identifies combinations of prior art references that would render the claims of US Patent 12,578,159 (the '159 patent) obvious to a person having ordinary skill in the art (POSITA) at the time of the invention. The motivation to combine these references stems from the clear desire in the art to increase the rate of semi-automatic fire and to provide "drop-in" trigger mechanisms for popular firearm platforms, as explicitly stated in the background and summary of the '159 patent itself.

The '159 patent primarily claims a firearm trigger mechanism with a "three-position" safety selector offering safe, standard semi-automatic, and forced reset semi-automatic modes. Key elements include a hammer, trigger member, disconnector, and a cam that is acted upon by the bolt carrier to force the trigger towards the set position. The crucial distinction between standard and forced reset modes lies in the safety selector's ability to prevent the disconnector from catching the hammer in the forced reset mode.

Combination 1: Blakley (US 7,398,723) in view of Graves (US 9,568,264, US 9,816,772, or US 9,939,221)

Blakley (US 7,398,723):
Brian A. Blakley's U.S. Pat. No. 7,398,723 ("Blakley '723"), explicitly referenced in the '159 patent, describes a trigger forward displacement system that uses a pivoting cam contacted by the rearwardly traveling bolt carrier to press down on the trigger extension, forcing the rear of the trigger down and the front (finger-engaging) surface forward. This patent clearly teaches a mechanism for a forced reset trigger utilizing a cam and the bolt carrier. It aims to increase the rate of semi-automatic fire.

Graves (US 9,568,264; US 9,816,772; US 9,939,221):
The '159 patent also references several patents by Thomas Allen Graves (US 9,568,264, US 9,816,772, and US 9,939,221), which describe devices that forcefully reset the trigger with rigid mechanical contact between the trigger member and the bolt as the action cycles. These patents focus on "Flex-Fire Technology" and disclose reciprocating gun bolt-driven trigger and integrated safety mechanisms, with the trigger being positively mechanically reset by the gun bolt. Graves' patents generally provide for a trigger that is blocked from depression until the operating cycle is nearly complete, ensuring proper reset before a subsequent shot.

Motivation to Combine:
A POSITA, seeking to improve forced reset triggers (as explicitly desired in Blakley '723), would be motivated to combine the cam-based forced reset taught by Blakley '723 with the principles of preventing early hammer release and ensuring proper reset as taught by Graves. While Graves' patents describe rigid mechanical contact and a modified bolt carrier, and Blakley '723 uses a pivoting cam, the overarching goal in both is to achieve a faster semi-automatic firing rate by mechanically resetting the trigger.

The motivation would be to integrate a selector means to allow both a standard semi-automatic mode (where the disconnector functions normally) and a forced reset mode (where the disconnector is bypassed and the cam forces the trigger reset). Blakley '723 already provides the cam-based forced reset. The concept of disabling the disconnector for a "forced reset" or "rapid fire" mode is known in the art, as demonstrated by the various "forced reset triggers" and "bump firing" techniques discussed in the background of the '159 patent and related documents. Implementing a "three-position" safety selector to enable or disable the disconnector's interaction with the hammer, as described in the '159 patent claims, would be an obvious design choice for a POSITA to achieve selectable firing modes from existing forced reset trigger designs. The Graves patents, by focusing on controlling trigger depression during the operating cycle, highlight the need for mechanisms that ensure a proper reset before another shot.

Combination 2: ABC IP LLC's own prior art (US 10,514,223 and US 11,346,627 and US 18/048,572) in view of Blakley (US 7,398,723)

ABC IP LLC's Prior Art (US 10,514,223, US 11,346,627, and US 18/048,572):
The '159 patent explicitly states that its assignee, ABC IP LLC, also owns U.S. Pat. Nos. 10,514,223 and 11,346,627 and U.S. patent application Ser. No. 18/048,572 (now US 12274807B2) which are incorporated by reference. These references disclose devices where "the hammer forces the trigger to the set position, and a locking bar prevents early hammer release." Specifically, US 10,514,223 describes a trigger mechanism where the hammer forcibly contacts the trigger member to reset it when the hammer is displaced by the cycling bolt carrier. US 11,346,627 also describes a forced reset semi-automatic trigger with a sliding blocking bar. These patents, owned by the same assignee, demonstrate the ongoing development and knowledge within ABC IP LLC regarding forced reset trigger mechanisms and mechanisms to prevent early hammer release.

Blakley (US 7,398,723):
As discussed above, Blakley '723 describes a pivoting cam arrangement, actuated by the bolt carrier, that forces the trigger forward to reset.

Motivation to Combine:
A POSITA, particularly one working for ABC IP LLC, would be highly motivated to combine the cam-based forced reset mechanism of Blakley '723 with the locking bar/hammer-forced reset mechanisms described in US 10,514,223 and US 11,346,627. The '159 patent explicitly states that "further improvement in forced reset triggers is desired." This provides a clear motivation to integrate different known forced-reset mechanisms or combine their advantageous features.

The '159 patent's description of a "three position" safety selector, which prevents the disconnector hook from catching the hammer hook in the forced reset mode, is a logical evolution. Given that US 10,514,223 and US 11,346,627 already deal with preventing "early hammer release" via a locking bar, a POSITA would recognize that controlling the disconnector's engagement is another way to manage the trigger reset behavior and enable a forced reset mode. Blakley '723 already employs a cam that forces the trigger to reset, and the concept of selecting between modes (standard semi-automatic and forced reset) by manipulating the disconnector's role would be an obvious combination to create a versatile trigger mechanism. The '159 patent itself notes that a provisional application for a pivoting cam arrangement with a three-position safety selector was filed by Brian A. Blakley, further suggesting this combination was a natural progression of existing ideas.

In summary, the core inventive step of the '159 patent, the selectable three-position safety selector controlling the disconnector's interaction with a cam-driven forced reset trigger, appears to be an obvious combination of elements found in the prior art, particularly when considering the explicit desire for improved forced reset triggers and the prior work by the same inventor and assignee in this field.