Inventor · disambiguated record
Seiya Shima
Also filed as: INABA HIROMI · SHIMA SEIYA
20 granted patents·347 citations·filing 1975–1987
96Inventor score
Files withHITACHI LTD20
Top patents by PatentIndex Score
20 records- 0184US4099111AControl apparatus for DC motorHITACHI LTD·Filed 1976·Granted Jul 4, 1978·27 cites·14 claims
- 0276US4833586APWM control for power converter system utilizing pulse dropping at minimum pulse widthsHITACHI LTD·Filed 1987·Granted May 23, 1989·31 cites·10 claims
- 0376US4780660AApparatus for compensating reactive power by current-source type converterHITACHI LTD·Filed 1987·Granted Oct 25, 1988·36 cites·4 claims
- 0474US4263988ASpeed control system for a motorHITACHI LTD·Filed 1978·Granted Apr 28, 1981·23 cites·20 claims
- 0573US4499986AControl apparatus for passenger conveyorHITACHI LTD·Filed 1982·Granted Feb 19, 1985·24 cites·8 claims
- 0672US4672520ACurrent-source power converting apparatus with self-extinction devicesHITACHI LTD·Filed 1985·Granted Jun 9, 1987·29 cites·4 claims
- 0772US4387436AMethod and apparatus for detecting elevator car positionHITACHI LTD·Filed 1980·Granted Jun 7, 1983·23 cites·8 claims
- 0870US4870556AMethod and apparatus for controlling power converterHITACHI LTD·Filed 1987·Granted Sep 26, 1989·28 cites·26 claims
- 0966US4553640AController for elevatorHITACHI LTD·Filed 1982·Granted Nov 19, 1985·17 cites·18 claims
- 1066US4133018AThyristor fault-detecting apparatusHITACHI LTD·Filed 1977·Granted Jan 2, 1979·16 cites·6 claims
- 1161US4829416AApparatus for controlling power transducers of the pulse width modulation (PWM) control typeHITACHI LTD·Filed 1987·Granted May 9, 1989·21 cites·11 claims
- 1259US4039866AThyristor control apparatusHITACHI LTD·Filed 1976·Granted Aug 2, 1977·8 cites·7 claims
- 1357US4441584AAC Elevator control systemHITACHI LTD·Filed 1981·Granted Apr 10, 1984·13 cites·21 claims
- 1451US4361866APower converter apparatusHITACHI LTD·Filed 1981·Granted Nov 30, 1982·9 cites·15 claims
- 1549US4245293APower converter systemHITACHI LTD·Filed 1978·Granted Jan 13, 1981·7 cites·8 claims
- 1643US4171505AFault detecting system for a control systemHITACHI LTD·Filed 1977·Granted Oct 16, 1979·7 cites·26 claims
- 1742US4256204ASafety apparatus for elevator systemHITACHI LTD·Filed 1978·Granted Mar 17, 1981·8 cites·7 claims
- 1842US4007414ACurrent transducer arrangementHITACHI LTD·Filed 1975·Granted Feb 8, 1977·5 cites·13 claims
- 1941US4779709AApparatus for controlling AC elevatorsHITACHI LTD·Filed 1986·Granted Oct 25, 1988·8 cites·7 claims
- 2036US4636932Adv/dt Protection circuit device for an AC-DC converter apparatusHITACHI LTD·Filed 1985·Granted Jan 13, 1987·7 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →