Inventor
SEKI KUNIO
27 patents
⚠️ This page may combine multiple inventors who share the name “SEKI KUNIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
22 patentsUS5384516AJan 24, 1995
Information processing apparatus including a control circuit for controlling a liquid crystal display illumination based on whether illuminatio power is being supplied from an AC power source or from a battery
HITACHI LTD121 citations97
US6344721B2Feb 5, 2002
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD47 citations95
US6563286B2May 13, 2003
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD23 citations92
US6340873B2Jan 22, 2002
Semiconductor integrated circuit for brushless motor drive control and brushless motor drive control apparatus
HITACHI LTD27 citations92
US5847521ADec 8, 1998
Method and apparatus for driving an electric motor
HITACHI LTD29 citations92
US5293077AMar 8, 1994
Power switching circuit
HITACHI LTD48 citations92
US4403240ASep 6, 1983
Integrated circuit with at least three ground pads
HITACHI LTD35 citations90
US4321428AMar 23, 1982
Acoustic monolithic power semiconductor integrated circuit and acoustic system using the same
HITACHI LTD18 citations74
US4258406AMar 24, 1981
Protecting circuit
HITACHI LTD13 citations74
US4145666AMar 20, 1979
Multistage amplifier circuit
HITACHI LTD8 citations74
US4017749AApr 12, 1977
Transistor circuit including source voltage ripple removal
HITACHI LTD9 citations74
US4015215AMar 29, 1977
Push-pull power amplifier circuit
HITACHI LTD12 citations74
US3947637AMar 30, 1976
Signal composing circuit
HITACHI LTD8 citations74
US5621288AApr 15, 1997
Motor speed regulating circuit with starter and storage medium drive using the same
HITACHI LTD10 citations72
US5428281AJun 27, 1995
Semiconductor integrated circuit device
HITACHI LTD9 citations72
US4543539ASep 24, 1985
Amplifier
HITACHI LTD7 citations71
US4414514ANov 8, 1983
Two signal amplifying system
HITACHI LTD12 citations71
US4051443ASep 27, 1977
Differential amplifier
HITACHI LTD4 citations63
US3988693AOct 26, 1976
Complementary push-pull amplifier device with protective circuit means
HITACHI LTD5 citations63
US4503478AMar 5, 1985
Transistor power amplifier circuit
HITACHI LTD3 citations60
US4336504AJun 22, 1982
Push-pull output circuit
HITACHI LTD2 citations53
US3942128AMar 2, 1976
Constant-voltage circuit
HITACHI LTD2 citations53