Inventor · disambiguated record
Keizo Tsukada
Also filed as: TSUKADA KEIZO
6 granted patents·155 citations·filing 1979–1993
85Inventor score
Top patents by PatentIndex Score
6 records- 0174US4640987ACordless telephoneTSUKADA KEIZO·Filed 1985·Granted Feb 3, 1987·53 cites·12 claims
- 0270US4267467ATimer circuitSONY CORP·Filed 1979·Granted May 12, 1981·13 cites·13 claims
- 0368US4650931ACordless telephoneSONY CORP·Filed 1985·Granted Mar 17, 1987·31 cites·19 claims
- 0465US4639550ACordless telephoneSONY CORP·Filed 1985·Granted Jan 27, 1987·36 cites·23 claims
- 0549US5363430ACordless telephone apparatus having a low power stand-by mode and a hold modeSONY CORP·Filed 1993·Granted Nov 8, 1994·19 cites·1 claims
- 0636US4205274APower amplifier circuitSONY CORP·Filed 1979·Granted May 27, 1980·3 cites·11 claims
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