Inventor · disambiguated record
Zenji Tsutsumi
Also filed as: TSUTSUMI ZENJI
4 granted patents·57 citations·filing 1978–1995
76Inventor score
Technology areasG11B
Top patents by PatentIndex Score
4 records- 0174US5574881AHigh capacity data storage method and system using independently controlled heads and circuitry for monitoring access frequency of data recordsHITACHI LTD·Filed 1995·Granted Nov 12, 1996·28 cites·6 claims
- 0270US5408452AOptical information recording/reproducing system including novel tracking systemHITACHI MAXELL·Filed 1991·Granted Apr 18, 1995·20 cites·3 claims
- 0346US4222081AInformation reading device for a multitrack storage deviceHITACHI LTD·Filed 1978·Granted Sep 9, 1980·5 cites·5 claims
- 0441US4563760AMethod of detecting light spot control signalHITACHI LTD·Filed 1982·Granted Jan 7, 1986·4 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →