Samsung v. Staton Techiya — Federal Circuit Cross-Appeal Voluntarily Dismissed
Samsung Electronics and Staton Techiya clashed at the Federal Circuit over the validity of US8315400B2, a patent covering acoustic management control of multiple microphones. After 531 days, Samsung filed a notice of non-participation and the parties jointly stipulated to voluntary dismissal of Samsung’s cross-appeal under FRAP 42(b).
Samsung’s Federal Circuit cross-appeal ends without a merits ruling
Samsung Electronics Co., Ltd. and Samsung Electronics America, Inc. (collectively, Samsung) filed Appeal No. 23-2292 at the Court of Appeals for the Federal Circuit on 17 August 2023. The appeal arose from a Patent Trial and Appeal Board proceeding in an invalidity and cancellation action targeting US8315400B2, held by Staton Techiya, LLC. The patent in dispute covers methods and devices for acoustic management control of multiple microphones — technology with direct relevance to consumer electronics, hearables, and smart device audio processing.
The case closed on 29 January 2025 following two procedural filings: a notice of non-participation by Samsung (ECF No. 41), and a joint stipulation of voluntary dismissal of Samsung’s cross-appeal (ECF No. 40) submitted by both parties pursuant to Federal Rule of Appellate Procedure 42(b). The Federal Circuit issued no ruling on the merits of the patentability dispute. The basis of termination is recorded as voluntary dismissal, though the public record does not specify whether this dismissal was with or without prejudice.
The 531-day duration and the sequence of a non-participation notice followed by a joint stipulation suggests the parties may have reached a commercial resolution, though no settlement terms have been disclosed. The underlying PTAB proceeding — which prompted the cross-appeal — remains the last substantive determination of record on US8315400B2’s validity. What drove Samsung’s decision to withdraw rather than pursue a merits ruling is not disclosed in the public docket.
Filing to Voluntary dismissal in 531 days
531 days from filing to closure — consistent with Federal Circuit appeal timelines for PTAB-origin cases
Voluntarily dismissed: what the joint stipulation means for both parties
FRAP 42(b) voluntary dismissal — no merits adjudication
Federal Rule of Appellate Procedure 42(b) permits parties to dismiss an appeal by filing a signed stipulation. Here, both Samsung and Staton Techiya jointly agreed to terminate Samsung’s cross-appeal. Critically, the Federal Circuit issued no opinion on the underlying patentability question. The PTAB’s prior determination is therefore the last substantive ruling of record on US8315400B2’s validity.
Procedural exit — no merits rulingWith or without prejudice? The public record is silent
A voluntary dismissal under FRAP 42(b) may be with or without prejudice to refiling, but the case record as publicly available does not specify which applies here. This distinction matters: dismissal without prejudice would leave open future challenge routes, while dismissal with prejudice would foreclose Samsung from re-raising the same invalidity arguments at the Federal Circuit level. Practitioners should not assume either outcome without reviewing the full stipulation.
Prejudice status: unconfirmedStaton Techiya retains US8315400B2 with PTAB ruling intact
With Samsung’s cross-appeal dismissed and no Federal Circuit merits ruling issued, Staton Techiya retains US8315400B2 and the PTAB’s last substantive decision stands as the operative determination on validity. Whether that PTAB outcome was fully favourable to Staton Techiya is not detailed in the cross-appeal record, but the dismissal removes an active appellate challenge to the patent’s enforceability.
Patent survives appellate challengeMulti-microphone audio IP remains a live enforcement risk
US8315400B2 covers acoustic management control of multiple microphones — a technology embedded in smartphones, earbuds, conferencing devices, and smart speakers. The voluntary dismissal, without a merits ruling, leaves the patent’s enforceability neither confirmed nor invalidated at the Federal Circuit level. Product teams and IP counsel in the audio and consumer electronics sectors should treat this patent as potentially enforceable and consider freedom-to-operate analysis accordingly.
Enforceability risk persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Samsung Electronics Co., Ltd. | Company | Global consumer electronics group — appellant in PTAB invalidity challenge over US8315400B2Search in Eureka ↗ |
| Co-Plaintiff | Samsung Electronics America, Inc. | Company | Search in Eureka ↗ |
| Defendant | Staton Techiya, LLC | Company | Staton Techiya, LLC — patent assertion entity holding US8315400B2 for multi-microphone acoustic managementSearch in Eureka ↗ |
| Plaintiff counsel | David A. Caine | Attorney | Counsel for Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Arnold & Porter Kaye Scholer LLP | Law Firm | Representing Samsung Electronics Co., Ltd.Search in Eureka ↗ |
| Defendant counsel | Jason Mitchell Shapiro | Attorney | Counsel for Staton Techiya, LLCSearch in Eureka ↗ |
| Defendant counsel | Timothy Devlin | Attorney | Counsel for Staton Techiya, LLCSearch in Eureka ↗ |
| Defendant law firm | Devlin Law Firm LLC | Law Firm | Representing Staton Techiya, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
Official order — verbatim text
The dismissal was effected by joint stipulation under FRAP 42(b), preceded by Samsung’s notice of non-participation. No substantive opinion was issued; the Federal Circuit made no determination on the patentability of US8315400B2. The operative record is therefore the PTAB’s prior ruling. The joint nature of the stipulation suggests both parties consented to exit the appeal — consistent with a negotiated resolution — though no terms are publicly disclosed. The silence on prejudice status leaves future challenge routes formally ambiguous.
US8315400B2 — Acoustic Management Control of Multiple Microphones
US8315400B2 covers methods and devices for acoustic management control across multiple microphone inputs. Filed under application number US12/135816, the patent sits at the intersection of audio signal processing and device firmware — governing how a device selects, weights, or manages inputs from two or more microphones. This class of technology underpins noise cancellation, beam-forming, and voice-activity detection in modern consumer audio hardware.
The commercial relevance of US8315400B2 is significant: multi-microphone acoustic management is a core feature in smartphones, true-wireless earbuds, smart speakers, video conferencing hardware, and AR/VR headsets. Staton Techiya’s decision to assert this patent against a major global OEM like Samsung — and to pursue the dispute through PTAB and into the Federal Circuit — suggests confidence in the patent’s claim scope. For competitors and adjacent implementers, the unresolved appellate status elevates this patent’s enforcement risk profile.
Should your product team run an FTO against US8315400B2?
Any organisation shipping hardware that manages audio input from two or more microphones should assess exposure to US8315400B2. This includes TWS earbuds, smartphones, laptops with array microphones, conferencing systems, and smart home devices. The patent’s claims were substantive enough to sustain a PTAB proceeding and a Federal Circuit appeal — and no appellate invalidity ruling has cleared it. R&D teams integrating multi-mic acoustic management should treat this patent as live risk.
PatSnap Eureka’s FTO Search Agent enables IP and product teams to map the claims of US8315400B2 against their specific implementation, identify prior art that survived or was not raised in the PTAB proceeding, and surface related patents in Staton Techiya’s portfolio. Eureka’s claim-chart automation and semantic patent search reduce the time to a defensible FTO opinion — critical when a patent has been actively enforced against a tier-one OEM.
Run a freedom-to-operate analysis on US8315400B2 to assess your product’s exposure
Run FTO in Eureka →Similar Federal Circuit appeals in multi-microphone and audio processing IP
Cases involving PTAB-origin patentability appeals at the Federal Circuit in the audio processing and acoustic technology sector, including multi-microphone management patents.
What this case signals for the audio technology IP landscape
A voluntary dismissal at the Federal Circuit, with no merits ruling, reshapes the risk calculus for multi-microphone audio patent portfolios.
PTAB remains the last word on US8315400B2 validity
With the Federal Circuit cross-appeal dismissed before any merits opinion, the PTAB’s determination is the operative record on the patent’s validity. Companies relying on that PTAB outcome as a shield against enforcement exposure should note that no higher court has confirmed it. The patent’s enforceability status is unresolved at appellate level.
Non-participation notice is an early signal worth monitoring
Samsung’s filing of a non-participation notice before the joint stipulation suggests a staged withdrawal — possibly linked to a commercial agreement. In Federal Circuit practice, non-participation followed by voluntary dismissal often correlates with licensing resolution. IP teams tracking similar assertion patterns should flag this sequence as a potential settlement indicator in comparable cases.
Samsung v Staton — key questions answered
Samsung Electronics filed a cross-appeal at the Federal Circuit from a PTAB invalidity/cancellation proceeding targeting US8315400B2, held by Staton Techiya. After 531 days, Samsung filed a notice of non-participation and both parties jointly stipulated to voluntary dismissal under FRAP 42(b). No merits ruling was issued.
Voluntary dismissal under FRAP 42(b) means the Federal Circuit issued no opinion on the patent’s validity. The PTAB’s prior determination remains the last substantive ruling of record. The patent’s enforceability is neither confirmed nor invalidated at the appellate level, leaving the risk status formally unresolved.
The public record as available does not specify whether the voluntary dismissal was with or without prejudice. Practitioners should review the full joint stipulation (ECF No. 40) filed at the Federal Circuit to determine the precise terms before drawing conclusions about Samsung’s ability to raise similar invalidity arguments in future proceedings.
US8315400B2 covers methods and devices for acoustic management control of multiple microphones — including how a device selects, weights, or routes audio from two or more microphone inputs. This technology is embedded in smartphones, earbuds, conferencing hardware, and smart speakers, making it directly relevant to a wide range of consumer electronics product teams.
IP counsel advising companies in the audio hardware sector should: (1) treat US8315400B2 as potentially enforceable given the absence of a Federal Circuit invalidity ruling; (2) review the PTAB record for the scope of any cancellation already obtained; (3) conduct or refresh an FTO analysis against the surviving claims; and (4) monitor Staton Techiya’s broader patent portfolio for related acoustic management filings.
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