Background
Empower Tribe Commercial FZE is the UAE-registered holding entity of Behringer and TC Electronic, the music equipment brands known for affordable professional audio gear. TC Electronic popularized polyphonic guitar tuning with its PolyTune pedal line, which allows a guitarist to strum all strings simultaneously and see the tuning status of each string at once—rather than tuning string by string. This approach, now standard in the professional guitar market, was the subject of a patent held by Empower Tribe.
In October 2025, Empower Tribe sued Roland Corporation—parent of the Boss brand—alleging that Boss’s polyphonic tuner pedals infringed its patents. Boss’s polyphonic tuner operates similarly, showing multiple string-tuning data in a single visual display. Roland moved to dismiss the patent claims under 35 U.S.C. § 101, arguing the asserted claims are directed to an abstract idea and contain no inventive concept that would bring them within the realm of patentable subject matter.
The Court’s Holding
Judge Garnett granted Roland’s motion to dismiss. Applying the two-step Alice/Mayo framework, the court first found that the asserted claims are directed to an abstract idea—specifically, the concept of simultaneously detecting and displaying the tuning status of multiple musical instrument strings. The idea of measuring multiple inputs and showing the results in a display mode is a fundamental data-processing concept not made patentable simply by applying it to musical instruments.
At Alice step two, Empower Tribe argued that the claims recite an inventive concept through a “mode-dependent display” that allows a user to switch between monophonic and polyphonic tuning modes. The court was not persuaded. Switching between display modes based on detected input is a well-understood and conventional application of generic computer functionality. The claim elements, considered individually and as an ordered combination, do not transform the abstract idea into a patent-eligible invention. The case was dismissed on the pleadings.
Key Takeaways
- User-interface patents that recite switching between display modes to show multiple-versus-single data streams face serious § 101 risk under Alice step two; courts are skeptical that mode-selection logic constitutes an inventive concept above conventional computing practice.
- The guitar/music tech space is not exempt from the Alice framework’s reach. Even patents that cover physical, commercially successful products (like a market-leading polyphonic tuner) can be eliminated at the pleadings stage if the claim is framed at a sufficiently abstract level.
- Empower Tribe may seek to amend to add more specific hardware claim elements, or may appeal; the dismissal at the pleadings stage (not on summary judgment) leaves some procedural runway.
Why It Matters
The polyphonic tuner dispute highlights a recurring problem for consumer electronics patents: when a product’s core differentiation is a user-experience design choice (show all string tunings at once) rather than novel hardware circuitry, patents protecting it tend to be framed at the algorithm/concept level—making them vulnerable to § 101 challenges. This ruling may embolden other guitar and audio equipment makers facing similar patents to move early for § 101 dismissal rather than engaging in lengthy claim construction and invalidity analysis. For patent drafters in the consumer electronics space, it reinforces the importance of anchoring claims to specific hardware configurations rather than functional outcomes.