Individual holder
ASHWORTH WILLIAM J
5 granted patents·127 citations·filing 1978–1992
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0190US5031501AMethod for attaching an audio transducer to a string musical instrumentASHWORTH WILLIAM J·Filed 1990·Granted Jul 16, 1991·42 cites·1 claims
- 0282US4151379AElectromagnetic speaker with bucking parallel high and low frequency coils drives sounding board and second diaphragm or external apparatus via magnetic coupling and having adjustable air gap and slot pole pieceASHWORTH WILLIAM J·Filed 1978·Granted Apr 24, 1979·51 cites·31 claims
- 0343US5058173ACombination inertia type audio transducer and loudspeakerASHWORTH WILLIAM J·Filed 1990·Granted Oct 15, 1991·19 cites·5 claims
- 0434US5287413ADual voice coil sound reproducing deviceASHWORTH WILLIAM J·Filed 1992·Granted Feb 15, 1994·10 cites·2 claims
- 0532US4718098AMulti-diaphragm artificial reverberation deviceASHWORTH WILLIAM J·Filed 1986·Granted Jan 5, 1988·5 cites·2 claims
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