Inventor · disambiguated record
Shunji Tokuyama
Also filed as: SUGAWARA HIROYUKI · TOKUYAMA SHUNJI
5 granted patents·141 citations·filing 1975–1994
83Inventor score
Technology areasH01H
Files withHITACHI LTD5
Top patents by PatentIndex Score
5 records- 0191US4216513AD.C. Circuit breakerHITACHI LTD·Filed 1978·Granted Aug 5, 1980·38 cites·8 claims
- 0286US4618905ADC circuit breakerHITACHI LTD·Filed 1984·Granted Oct 21, 1986·30 cites·11 claims
- 0382US5543597AGrounding switch gear deviceHITACHI LTD·Filed 1994·Granted Aug 6, 1996·41 cites·16 claims
- 0478US4578730AHigh-voltage DC circuit breaker apparatusHITACHI LTD·Filed 1983·Granted Mar 25, 1986·23 cites·4 claims
- 0556US3996439APuffer-type gas-blast circuit breakerHITACHI LTD·Filed 1975·Granted Dec 7, 1976·9 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →