Inventor · disambiguated record
Kenkichi Umeda
Also filed as: UMEDA KENKICHI
8 granted patents·173 citations·filing 1974–1981
88Inventor score
Files withSONY CORP8
Top patents by PatentIndex Score
8 records- 0194US4167692ABrush-less DC motorSONY CORP·Filed 1977·Granted Sep 11, 1979·71 cites·17 claims
- 0288US4038692ATape sensing device for magnetic tape recording and/or reproducing apparatusSONY CORP·Filed 1975·Granted Jul 26, 1977·31 cites·16 claims
- 0386US4041453ASignal handling system for minimizing dropout effectSONY CORP·Filed 1974·Granted Aug 9, 1977·26 cites·11 claims
- 0477US3940799ATape cassette with erasure prevention recesses at rear cornersSONY CORP·Filed 1974·Granted Feb 24, 1976·16 cites·3 claims
- 0564US4139875ACassette and card recording and/or reproducing apparatusSONY CORP·Filed 1977·Granted Feb 13, 1979·12 cites·11 claims
- 0657US4445150ARecording in a single track visual signals associated with audio signals recorded in opposed directions in plural tracksSONY CORP·Filed 1981·Granted Apr 24, 1984·11 cites·8 claims
- 0742US4079426ATape speed switching multiple track tape recorderSONY CORP·Filed 1976·Granted Mar 14, 1978·5 cites·2 claims
- 0832US4005480ATape cassette and machineSONY CORP·Filed 1975·Granted Jan 25, 1977·1 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when Kenkichi Umeda files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →