Inventor · disambiguated record
Keizo Ishiwatari
Also filed as: ISHIWATARI KEIZO · TAKEUCHI HIROSHI
4 granted patents·63 citations·filing 1977–1982
78Inventor score
Files withMATSUSHITA ELECTRIC INDUSTRIAL CO LTD4
Top patents by PatentIndex Score
4 records- 0174US4251297AMethod for manufacturing magnetic head using boronizing treatmentMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Feb 17, 1981·16 cites·7 claims
- 0259US4470479AMethod of making metal coated foil speaker diaphragmMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1979·Granted Sep 11, 1984·22 cites·28 claims
- 0357US4613919AMagnetic erasing headMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1982·Granted Sep 23, 1986·11 cites·7 claims
- 0449US4216271AComposite diaphragm for speakerMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1977·Granted Aug 5, 1980·14 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →