Inventor · disambiguated record
Sadayoshi Nakagawa
Also filed as: HASHIMOTO KATSUTOSHI · NAKAGAWA SADAYOSHI
4 granted patents·231 citations·filing 1979–1982
81Inventor score
Technology areasH04R
Files withHOSIDEN ELECTRONICS CO4
Top patents by PatentIndex Score
4 records- 0189US4456796AUnidirectional electret microphoneHOSIDEN ELECTRONICS CO·Filed 1982·Granted Jun 26, 1984·106 cites·14 claims
- 0288US4281222AMiniaturized unidirectional electret microphoneHOSIDEN ELECTRONICS CO·Filed 1979·Granted Jul 28, 1981·76 cites·7 claims
- 0371US4268725AElectret microphoneHOSIDEN ELECTRONICS CO·Filed 1979·Granted May 19, 1981·35 cites·9 claims
- 0443US4236051AElectret microphoneHOSIDEN ELECTRONICS CO·Filed 1979·Granted Nov 25, 1980·14 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →