Challenged claims of Immersion Corporation’s patent that describes a device that includes a proximity sensor and a touch sensor for detecting non-contact and contact-based interactions are unpatentable as anticipated by and obvious over prior art, the Patent Trial and Appeal Board said, in an inter partes review by Valve Corporation. The board determined that the challenged claims are anticipated by and obvious over prior art that describes a haptic touch-screen device with a proximity sensor and controller, describes a method of distinguishing two input signals, and discloses an electromechanical polymer-based sensor.
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