Assignee
SHAFFER JOHN R
US·5 granted patents·173 citations·filing 1988–2010
Top patents by PatentIndex Score
5 records- 0185US8481839B2System and methods for synchronizing audio and/or visual playback with a fingering display for musical instrumentSHAFFER JOHN R·Filed 2009·Granted Jul 9, 2013·31 cites·39 claims
- 0285US5266735AMusic training instrument and methodSHAFFER JOHN R·Filed 1992·Granted Nov 30, 1993·74 cites·17 claims
- 0379US4915005AFingering display for musical instrumentSHAFFER JOHN R·Filed 1988·Granted Apr 10, 1990·53 cites·19 claims
- 0476US7173175B2Stringed instrument fingerboard for use with a light-systemSHAFFER JOHN R·Filed 2004·Granted Feb 6, 2007·13 cites·41 claims
- 0563US8106288B2Methods and apparatus for transmitting finger positions to stringed instruments having a light-systemSHAFFER JOHN R·Filed 2010·Granted Jan 31, 2012·2 cites·28 claims
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