Inventor · disambiguated record
Takeki Ando
Also filed as: ANDO TAKEKI
15 granted patents·254 citations·filing 1976–1990
94Inventor score
Files withHITACHI LTD15
Top patents by PatentIndex Score
15 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
- 0374US4263988ASpeed control system for a motorHITACHI LTD·Filed 1978·Granted Apr 28, 1981·23 cites·20 claims
- 0471US4787021ACurrent-type converter apparatusHITACHI LTD·Filed 1988·Granted Nov 22, 1988·26 cites·17 claims
- 0568US4884182ACurrent source power converting apparatus with overvoltage protectionHITACHI LTD·Filed 1988·Granted Nov 28, 1989·26 cites·12 claims
- 0666US4553640AController for elevatorHITACHI LTD·Filed 1982·Granted Nov 19, 1985·17 cites·18 claims
- 0766US4133018AThyristor fault-detecting apparatusHITACHI LTD·Filed 1977·Granted Jan 2, 1979·16 cites·6 claims
- 0859US5155671APower converter with current-type inverterHITACHI LTD·Filed 1990·Granted Oct 13, 1992·27 cites·21 claims
- 0953US4629034AElevator control apparatusHITACHI LTD·Filed 1984·Granted Dec 16, 1986·13 cites·18 claims
- 1051US4361866APower converter apparatusHITACHI LTD·Filed 1981·Granted Nov 30, 1982·9 cites·15 claims
- 1149US4757436ACurrent-type converter protecting apparatusHITACHI LTD·Filed 1987·Granted Jul 12, 1988·13 cites·10 claims
- 1242US4256204ASafety apparatus for elevator systemHITACHI LTD·Filed 1978·Granted Mar 17, 1981·8 cites·7 claims
- 1341US4779709AApparatus for controlling AC elevatorsHITACHI LTD·Filed 1986·Granted Oct 25, 1988·8 cites·7 claims
- 1436US4636932Adv/dt Protection circuit device for an AC-DC converter apparatusHITACHI LTD·Filed 1985·Granted Jan 13, 1987·7 cites·2 claims
- 1534US4584636AAC-to-DC power converter with improved power factor and overvoltage suppressionHITACHI LTD·Filed 1983·Granted Apr 22, 1986·3 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →