u.s. patent pub. 2016-140941a1, entitled, "device for vibrating a stringed instrument", to...
DESCRIPTION
U.S. Patent Pub. 2016-140941A1, entitled, "Device for Vibrating a Stringed Instrument", to Kobayashi, May 19, 2016.TRANSCRIPT
DESCRIPTION
U.S. Patent Pub. 2016-140941A1, entitled, "Device for Vibrating a Stringed Instrument", to Kobayashi, May 19, 2016.TRANSCRIPT