Inventor · disambiguated record
Juan M. Del Castillo
Also filed as: DEL CASTILLO JUAN M · RUMER DAVID O JR
10 granted patents·105 citations·filing 1974–1977
89Inventor score
Files withCASTILLO JUAN M DEL10
Top patents by PatentIndex Score
10 records- 0171US4030400AChord playing attachment for a stringed instrumentCASTILLO JUAN M DEL·Filed 1975·Granted Jun 21, 1977·22 cites·6 claims
- 0270US4061072ADevice to identify chords on a keyboard instrument and key mechanism for use therewithCASTILLO JUAN M DEL·Filed 1976·Granted Dec 6, 1977·18 cites·14 claims
- 0366US4082029AOptical metronomesCASTILLO JUAN M DEL·Filed 1976·Granted Apr 4, 1978·15 cites·9 claims
- 0463US4070944AOptical metronomeCASTILLO JUAN M DEL·Filed 1976·Granted Jan 31, 1978·12 cites·7 claims
- 0561US4037511ATeaching device for attachment to an organCASTILLO JUAN M DEL·Filed 1975·Granted Jul 26, 1977·12 cites·17 claims
- 0660US3996833AOptical metronomeCASTILLO JUAN M DEL·Filed 1975·Granted Dec 14, 1976·11 cites·17 claims
- 0746US3942404AOptical metronome with transparent sheet musicCASTILLO JUAN M DEL·Filed 1974·Granted Mar 9, 1976·6 cites·5 claims
- 0844US3945292AOptical metronomeCASTILLO JUAN M DEL·Filed 1975·Granted Mar 23, 1976·6 cites·4 claims
- 0933US4163409AOptical metronomesCASTILLO JUAN M DEL·Filed 1977·Granted Aug 7, 1979·3 cites·3 claims
- 1028US4133989ADevice to identify chords on a keyboard instrument and key mechanism for use therewithCASTILLO JUAN M DEL·Filed 1977·Granted Jan 9, 1979·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →