A patent infringement dispute over automobile charging technology has concluded with a stipulated dismissal with prejudice in the U.S. District Court for the Central District of California. Shenzhen Carku Technology Co., Ltd., a Chinese manufacturer of automotive jump starters and portable chargers, filed suit against Pilot, Inc. on November 18, 2022, asserting U.S. Patent No. 11,376,971 B2 relating to automobile charger technology. After 629 days of litigation, the parties jointly filed a Rule 41(a)(1)(A)(ii) stipulation on August 8, 2024, agreeing to dismiss all claims and counterclaims with each side bearing its own attorneys’ fees and costs.

This case carries notable strategic implications for IP professionals operating in the competitive automotive accessories and portable power device market. The mutual cost-bearing arrangement and dismissal with prejudice — without any publicly disclosed judgment or damages award — strongly suggest a confidential settlement was reached between the parties. For patent counsel and in-house IP teams monitoring freedom-to-operate risks in the automobile charger space, understanding the scope of US11376971B2 and how this litigation resolved is critical to assessing ongoing exposure.

Case Overview

The Parties

The Patent at Issue

U.S. Patent No. 11,376,971 B2 (Application No. 17/495,196) covers technology related to automobile chargers — specifically portable devices capable of delivering controlled electrical charge to vehicle batteries. The patent’s claims likely encompass circuit design, power management features, or safety mechanisms that differentiate smart automotive charging devices from conventional chargers. In real-world application, this technology underpins portable jump starters and battery maintainers widely sold in automotive retail channels.

• • US11376971B2

Legal Representation

Plaintiff Counsel: Perkins Coie LLP (lead: Heath L. Hyatt)
Defendant Counsel: Payne & Fears LLP; Sheridan Ross PC (lead: Alex W. Ruge)

Litigation Timeline & Procedural History

This case was filed in the U.S. District Court for the Central District of California, one of the busiest and most patent-litigation-active federal districts in the country. As a first-instance district court proceeding, the matter would have proceeded through the full pretrial lifecycle — pleadings, claim construction, fact and expert discovery, and potentially summary judgment — before resolution. The Central District of California is a common venue choice for plaintiffs with connections to Pacific Rim markets, and it is notable that Carku, a Shenzhen-based company, selected this forum, likely due to Pilot’s U.S. operations and the distribution of the accused products in California.

The case ran for 629 days — approximately 21 months — before closing on August 8, 2024, via a stipulated dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(ii), which requires the consent of all parties. This procedural mechanism, as opposed to a unilateral voluntary dismissal, signals that both Carku and Pilot actively negotiated the exit terms. The dismissal with prejudice bars Carku from refiling the same infringement claims, and the mutual cost-bearing provision departs from the typical ‘loser pays’ expectation, reinforcing the inference of a confidential commercial resolution between the parties.

The Verdict & Legal Analysis

Outcome

The case was dismissed in its entirety with prejudice pursuant to a joint stipulation by both parties under Fed. R. Civ. P. 41(a)(1)(A)(ii), filed and entered on August 8, 2024. No damages were awarded by the court, no injunctive relief was granted, and no public judgment on the merits of the infringement or validity claims was issued. Each party agreed to bear its own attorneys’ fees and costs, and Carku’s right to refile the same claims is extinguished by the with-prejudice nature of the dismissal.

Verdict Cause Analysis

The basis for termination — a consent-based dismissal with prejudice — reflects the following legal and strategic dynamics in play at the time of resolution:

• A Rule 41(a)(1)(A)(ii) stipulated dismissal requires affirmative agreement from all parties, distinguishing this outcome from a unilateral withdrawal and indicating that Pilot’s consent was secured as part of a broader negotiated arrangement.
• The with-prejudice designation permanently forecloses Carku from asserting the same patent claims against Pilot on the same accused automobile charger products, providing Pilot with meaningful legal finality.
• The mutual cost-bearing provision — each side absorbing its own legal fees — is a hallmark indicator of a confidential settlement, as it avoids the economic asymmetry that would arise if one party had clearly prevailed on the merits.
• No claim construction order or summary judgment ruling appears to have been publicly issued prior to dismissal, suggesting the case resolved before dispositive motion practice concluded or while discovery was ongoing.

Legal Significance

1. 1. Because the dismissal was entered without any court ruling on the merits of US11376971B2’s validity or infringement scope, the patent retains its presumption of validity and remains an active litigation risk for other players in the automobile charger market.
2. 2. The absence of a published claim construction order means there is no judicial record narrowing or broadening the scope of US11376971B2’s claims, leaving the patent’s enforceability boundaries legally untested and potentially available for assertion in future disputes.
3. 3. Competitors and distributors of automobile charger products who were monitoring this case for guidance on design-around strategies will need to rely solely on the patent’s prosecution history and claim language, rather than any court-issued claim construction, to assess their own exposure.

Strategic Takeaways

For Patent Attorneys:

• Because no claim construction was issued, counsel advising clients in the automotive charger space should perform an independent analysis of US11376971B2’s claim scope using intrinsic evidence — the specification, prosecution history, and any IPR petitions — rather than relying on judicial guidance from this case.
• The Rule 41(a)(1)(A)(ii) mechanism used here is a preferred exit route when both parties seek finality without public disclosure of settlement terms; attorneys should structure any settlement agreement to preserve client confidentiality while securing the with-prejudice dismissal.
• Given that Carku is a Chinese entity asserting U.S. patents in U.S. courts, counsel for defendants facing similar suits should evaluate jurisdictional security bond requirements and enforcement risk as part of early case strategy.
• The mutual cost-bearing arrangement suggests neither party was in a dominant litigation posture; attorneys should use this case as a benchmark when advising clients on settlement timing relative to litigation spend in patent cases of comparable complexity.

For IP Professionals:

• In-house IP teams at automotive accessory companies should add US11376971B2 to their patent watch lists, as its validity remains unchallenged by this dismissal and Carku retains the right to assert it against other market participants.
• Portfolio managers should note that Carku’s willingness to litigate in U.S. courts signals an increasingly assertive international IP enforcement posture from Chinese automotive technology manufacturers, warranting proactive FTO analysis on imported automobile charger products.

For R&D Teams:

• Engineering teams developing or sourcing automobile chargers should conduct a claim-by-claim FTO review of US11376971B2 before finalizing product specifications, as the patent remains valid and enforceable following this dismissal.
• R&D leaders should consider documenting design decisions that differentiate their charging circuit architecture from the patented claims, creating a contemporaneous record that could support a non-infringement defense or design-around argument if the patent is later asserted.