InMusic Brands v. Roland Corp US: Federal Circuit Issues Split Decision on Electronic Drum Patents
InMusic Brands brought an infringement action against Roland Corp. US covering eight patents across electronic drums, redesigned cymbals, and drum kits. After 812 days, the Federal Circuit issued a rare four-way split ruling — affirming, reversing, vacating, and dismissing different portions — and remanded for further proceedings.
Eight-patent electronic drum dispute yields rare Federal Circuit split ruling
InMusic Brands, Inc. filed this appeal at the United States Court of Appeals for the Federal Circuit on January 5, 2023, challenging lower-level rulings concerning eight US patents covering electronic drum and cymbal technologies. The patents span hardware and signal-processing innovations central to InMusic’s electronic drum kits and redesigned cymbal products. Roland Corp. US — the US arm of the storied Japanese instrument manufacturer — was named as defendant, making this a high-stakes clash between two of the leading brands in electronic percussion.
The Federal Circuit closed the case on March 27, 2025, issuing a compound order: affirmed-in-part, reversed-in-part, vacated-in-part, dismissed-in-part, and remanded. The split ruling means that Roland secured outright wins on some patent claims or issues, InMusic preserved or recovered rights on others, and at least one substantive issue has been sent back to a lower forum. The dismissed portion suggests a procedural defect precluded appellate review of one or more sub-issues entirely.
An 812-day appellate timeline with eight patents and a four-way compound disposition is notably complex, suggesting extensive briefing and potentially oral argument on multiple discrete claim sets. The remand leaves the ultimate commercial stakes unresolved; practitioners should monitor subsequent lower-court proceedings to understand which claims survived and which were extinguished. The public record of the Federal Circuit docket does not, on its face, disclose the specific claims or patent numbers assigned to each portion of the split ruling.
Filing to Appeal Dismissed in Part in 812 days
812 days — longer than the median Federal Circuit patent appeal
Federal Circuit split: what the four-way ruling means for both parties
A four-way compound appellate disposition explained
The Federal Circuit’s order — affirmed-in-part, reversed-in-part, vacated-in-part, dismissed-in-part, and remanded — is one of the more complex dispositions an appellate court can issue. Each limb is legally distinct: ‘affirmed’ means the lower ruling stands on that issue; ‘reversed’ means the appellate court found reversible error; ‘vacated’ nullifies the lower ruling without a replacement decision; ‘dismissed’ ends review of a sub-issue on procedural grounds. The remand sends at least one issue back for further proceedings.
Multi-part appellate orderInMusic preserves some claims but faces remand uncertainty
The reversed-in-part and vacated-in-part components are consistent with InMusic recovering rights or nullifying adverse rulings on specific patents or claim sets. The remand means at least one issue returns to a lower forum where InMusic may still prevail. However, the affirmed portion confirms that some adverse rulings below are now final against InMusic, and the dismissed component signals at least one sub-issue could not be pursued on appeal.
Partial recovery, remand pendingRoland secures finality on some issues, but faces renewed exposure
The affirmed-in-part component is a win for Roland, locking in favorable lower-court rulings on those issues. The dismissed portion also removes certain appellate threats permanently. But the reversed-in-part ruling suggests Roland lost ground on at least one key issue, and the remand creates renewed litigation exposure. Roland’s legal team will need to defend its position on remanded issues before the lower tribunal, preserving potential for further appeal.
Partial win, remand exposureElectronic percussion IP landscape remains unsettled after remand
With eight patents and a split Federal Circuit ruling, the competitive dynamics between InMusic and Roland in the electronic drum market are not yet resolved. Until the remanded issues are decided, both parties face uncertainty over product freedom-to-operate for electronic cymbals and drum kits. Competitors and OEM suppliers should monitor the remand proceedings closely, as the surviving claims could affect design choices and supply-chain agreements across the electronic percussion sector.
Sector uncertainty continuesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | InMusic Brands, Inc. | Company | Electronic percussion instrument maker — holder of US6921857B2 and 7 further drum/cymbal patentsSearch in Eureka ↗ |
| Defendant | Roland, Corp. US | Company | Roland Corp. US — US subsidiary of Roland Corporation, major electronic instrument manufacturerSearch in Eureka ↗ |
| Plaintiff counsel | Christine K. Bush | Attorney | Counsel for InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Craig M. Scott | Attorney | Counsel for InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff counsel | J. Michael Jakes | Attorney | Counsel for InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Joseph W. Bain | Attorney | Counsel for InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff counsel | Laurel M. Rogowski | Attorney | Counsel for InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Finnegan, Henderson, Farabow, Garrett & Dunner, LLP | Law Firm | Representing InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Hinckley, Allen & Snyder LLP | Law Firm | Representing InMusic Brands, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Shutts & Bowen LLP | Law Firm | Representing InMusic Brands, Inc.Search in Eureka ↗ |
| Defendant counsel | Gene Whan Lee | Attorney | Counsel for Roland, Corp. USSearch in Eureka ↗ |
| Defendant counsel | Laura Ganoza | Attorney | Counsel for Roland, Corp. USSearch in Eureka ↗ |
| Defendant counsel | Nathan K. Kelley | Attorney | Counsel for Roland, Corp. USSearch in Eureka ↗ |
| Defendant counsel | Victor de Gyarfas | Attorney | Counsel for Roland, Corp. USSearch in Eureka ↗ |
| Defendant law firm | Foley & Lardner LLP | Law Firm | Representing Roland, Corp. USSearch in Eureka ↗ |
| Defendant law firm | Perkins Coie LLP | Law Firm | Representing Roland, Corp. USSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
Official order — verbatim text
The Federal Circuit’s compound order — affirmed-in-part, reversed-in-part, vacated-in-part, dismissed-in-part, and remanded — reflects the court’s treatment of multiple discrete issues arising from an eight-patent infringement action. Under the appellate standard of review, claim construction is reviewed de novo and factual findings for clear error. The split outcome suggests the panel found reversible legal error on at least one issue, factual support for the lower rulings on others, and a procedural bar to reviewing at least one sub-issue on the merits. The remand preserves live disputes at the lower level.
US6921857B2 and 7 further patents — electronic drum and cymbal technology
The eight patents at issue — including US6921857B2, US6881885B2, US7459626B2, US6756535B1, US6271458B1, US7385135B2, US6632989B2, and US6121538A — cover a broad range of innovations in electronic percussion. Application dates span from the late 1990s through the mid-2000s, placing these inventions at the core of the modern electronic drum kit’s technical evolution. The patents collectively protect triggering mechanisms, cymbal sensing hardware, signal processing, and pad-controller interactions central to InMusic’s product line.
This portfolio’s breadth — eight granted US patents across hardware and signal-processing domains — suggests InMusic has constructed a layered IP position designed to cover multiple points of potential competitive entry. For Roland and other electronic percussion manufacturers, the survival of even a subset of these claims through Federal Circuit review significantly elevates the cost and risk of designing competing products. The sector should note that affirmed claims from this appeal carry heightened validity presumptions, complicating future PTAB challenge strategies.
Should you run an FTO against US6921857B2 and the InMusic drum patent portfolio?
Any manufacturer, ODM, or retailer developing or sourcing electronic drum kits, electronic cymbals, or percussion trigger hardware should assess exposure against InMusic’s eight-patent portfolio. With the Federal Circuit having affirmed at least some claims and remanded others for further review, the enforceability window is live. Products incorporating electronic trigger sensing, cymbal vibration detection, or pad-to-controller signal processing are the highest-risk categories.
PatSnap Eureka’s FTO Search Agent can map your product’s technical features against the claim scope of all eight InMusic patents, flag design-around opportunities based on claim language that was affirmed versus reversed, and monitor the remand proceedings for new rulings that alter the risk picture. Run a portfolio-level FTO now to identify which claims survived and how they compare to your current or planned product architecture.
Run a freedom-to-operate analysis on US6921857B2 to assess your product’s exposure
Run FTO in Eureka →Similar Federal Circuit patent appeals in electronic musical instrument technology
These Federal Circuit cases involve comparable patent enforcement disputes in electronic percussion, musical instrument hardware, and consumer electronics signal-processing technology.
What this case signals for the electronic percussion IP landscape
Eight-patent Federal Circuit appeals with split outcomes are rare — this case reshapes enforcement risk across electronic drum and cymbal technology.
Split Federal Circuit rulings amplify remand risk for both sides
When the Federal Circuit issues a compound disposition, neither party can claim a clean win. Roland cannot design around claims that were reversed or vacated, and InMusic cannot rely on remanded issues as settled. In-house counsel should flag all eight patents in their FTO and monitoring workflows until the remand proceedings conclude.
Eight-patent portfolios are harder to invalidate wholesale at appeal level
The survival of at least some InMusic claims through Federal Circuit review suggests the patent portfolio has genuine depth. Competitors developing electronic drum or cymbal products should treat the affirmed claims as a high-validity enforcement risk — post-appeal affirmance significantly raises the bar for future IPR petitions on those specific claims.
InMusic v Roland — key questions answered
The Federal Circuit issued a split disposition on March 27, 2025: affirmed-in-part, reversed-in-part, vacated-in-part, dismissed-in-part, and remanded. This means the lower rulings were upheld on some issues, overturned on others, nullified on others, and at least one issue was returned to the lower tribunal for further proceedings. The public record does not specify which of the eight patents correspond to each limb of the ruling.
InMusic asserted eight US patents: US6921857B2, US6881885B2, US7459626B2, US6756535B1, US6271458B1, US7385135B2, US6632989B2, and US6121538A. These patents cover electronic drum and cymbal technology, including trigger sensing, vibration detection, and signal-processing hardware relevant to InMusic’s electronic drum kits and redesigned cymbal products.
A remand order means the Federal Circuit has sent at least one issue back to the lower tribunal — typically a district court or the Patent Trial and Appeal Board — for further proceedings consistent with the appellate court’s ruling. This means the case is not fully resolved; the lower forum must adjudicate the remanded issues, and either party may appeal again once those proceedings conclude.
The products at issue were InMusic’s electronic drums, redesigned electronic cymbals, and electronic drum kits. The case concerns whether these products infringe eight InMusic patents covering electronic percussion hardware and signal-processing technology. Roland Corp. US was the accused infringer in the underlying infringement action.
The appeal spanned 812 days, filed on January 5, 2023, and closed on March 27, 2025. An 812-day timeline is longer than a typical Federal Circuit patent appeal, which may reflect the complexity of briefing across eight patents and multiple discrete legal issues, as well as the court’s issuance of a compound four-way disposition with remand.
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