Inventor · disambiguated record
Fumio Tsutsumi
Also filed as: TANAKA YUJI · TSUTSUMI FUMIO
3 granted patents·15 citations·filing 1976–1978
64Inventor score
Files withNITSUKO LTD3
Top patents by PatentIndex Score
3 records- 0155US4081624AKey telephone intercom line systemNITSUKO LTD·Filed 1976·Granted Mar 28, 1978·8 cites·10 claims
- 0246US4185173AKey telephone call signalling circuitNITSUKO LTD·Filed 1978·Granted Jan 22, 1980·5 cites·4 claims
- 0335US4087649APulse counting circuitNITSUKO LTD·Filed 1976·Granted May 2, 1978·2 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →