Inventor
SASAYAMA TAKAO
JP54 patents
Patents
50 patentsUS5659254AAug 19, 1997
Capacitance type sensor device
HITACHI LTD104 citations98
US5616844AApr 1, 1997
Capacitance type acceleration sensor
HITACHI LTD74 citations94
US5693936ADec 2, 1997
Physical quantity detecting apparatus and internal combustion engine control apparatus each utilizing optical fiber
HITACHI LTD43 citations93
US4708480ANov 24, 1987
Solid-state optical interferometer
HITACHI LTD34 citations93
US4452210AJun 5, 1984
Fuel injection valve drive circuit
HITACHI LTD46 citations93
US4334186AJun 8, 1982
Apparatus for driving hot-wire type flow sensor
HITACHI LTD46 citations93
US4297881ANov 3, 1981
Hot-wire flow rate measuring apparatus
HITACHI LTD46 citations93
US4282842AAug 11, 1981
Fuel supply control system for internal combustion engine
HITACHI LTD29 citations93
US4201161AMay 6, 1980
Control system for internal combustion engine
HITACHI LTD48 citations93
US5831263ANov 3, 1998
In-cylinder pressure sensing apparatus for multi-cylinder engine
HITACHI LTD38 citations92
US4718999AJan 12, 1988
Air-fuel ratio detector
HITACHI LTD36 citations92
US4719373AJan 12, 1988
Gate circuit of combined field-effect and bipolar transistors
HITACHI LTD28 citations92
US4556807ADec 3, 1985
Pressure transducer with temperature compensation circuit
HITACHI LTD50 citations92
US4517837AMay 21, 1985
Air flow rate measuring apparatus
HITACHI LTD42 citations92
US5745611AApr 28, 1998
Optical fiber pressure sensor
HITACHI LTD32 citations91
US5323635AJun 28, 1994
Air fuel ratio detecting arrangement and method therefor for an internal combustion engine
HITACHI LTD31 citations91
US4781059ANov 1, 1988
Method and apparatus for detecting combustion pressure in engine
HITACHI LTD32 citations91
US4558238ADec 10, 1985
Pressure transducer using integrated circuit elements
HITACHI LTD30 citations91
US4890017ADec 26, 1989
CMOS-BiCMOS gate circuit
HITACHI LTD18 citations82
US4829201AMay 9, 1989
Gate circuit of combined field-effect and bipolar transistors
HITACHI LTD13 citations82
US4604535AAug 5, 1986
FET-bipolar switching device and circuit
HITACHI LTD23 citations82
US4396890AAug 2, 1983
Variable gain amplifier
HITACHI LTD23 citations82
US4348729ASep 7, 1982
Engine control system including non-volatile memory and correction data transfer method
HITACHI LTD25 citations82
US4236214ANov 25, 1980
Ignition timing control system for internal combustion engine
HITACHI LTD28 citations82
US4019474AApr 26, 1977
Air-fuel ratio regulating apparatus for an internal combustion engine with exhaust gas sensor characteristic compensation
HITACHI LTD29 citations82
US3939811AFeb 24, 1976
Ignition apparatus for internal combustion engine
HITACHI LTD20 citations82
US4630206ADec 16, 1986
Method of fuel injection into engine
HITACHI LTD20 citations76
US5692474ADec 2, 1997
Engine combustion control apparatus
HITACHI LTD17 citations74
US5001366AMar 19, 1991
Gate circuit of combined field-effect and bipolar transistors
HITACHI LTD7 citations74
US4837698AJun 6, 1989
Method of controlling air-fuel ratio
HITACHI LTD8 citations74
US4703430AOct 27, 1987
Method controlling air-fuel ratio
HITACHI LTD14 citations74
US4664773AMay 12, 1987
Air-to-fuel ratio sensor for an automobile
HITACHI LTD14 citations74
US4604899AAug 12, 1986
Semiconductor-type pressure transducer
HITACHI LTD11 citations74
US4585962AApr 29, 1986
Semiconductor switching device utilizing bipolar and MOS elements
HITACHI LTD8 citations74
US4523284AJun 11, 1985
Method of controlling internal combustion engine
HITACHI LTD9 citations74
US4501249AFeb 26, 1985
Fuel injection control apparatus for internal combustion engine
HITACHI LTD13 citations74
US4499880AFeb 19, 1985
Air-fuel ratio controlling apparatus for internal combustion engine
HITACHI LTD12 citations74
US4455980AJun 26, 1984
Engine combustion control method
HITACHI LTD17 citations74
US4366524ADec 28, 1982
Electromechanical transducer controlling device
HITACHI LTD12 citations74
US4363307ADec 14, 1982
Method for adjusting the supply of fuel to an internal combustion engine for an acceleration condition
HITACHI LTD15 citations74
US4363097ADec 7, 1982
Electronic type engine control method
HITACHI LTD18 citations74
US4175506ANov 27, 1979
Electric ignition control system
HITACHI LTD14 citations74
US4433650AFeb 28, 1984
System for controlling the starting operation of an internal combustion engine
HITACHI LTD10 citations73
US4030462AJun 21, 1977
Air-fuel ratio controller for internal-combustion engine
HITACHI LTD17 citations73
US4882030ANov 21, 1989
Air-fuel ratio detection system for engine exhaust gas
HITACHI LTD16 citations72
US5676851AOct 14, 1997
Method of making a capacitance type acceleration sensor
HITACHI LTD11 citations71
US4900425AFeb 13, 1990
Oxygen sensor
HITACHI LTD17 citations71
US5239212AAug 24, 1993
Gate circuit of combined field-effect and bipolar transistors with an improved discharge arrangement
HITACHI LTD4 citations63
US4522178AJun 11, 1985
Method of fuel control in engine
HITACHI LTD2 citations63
US4497302AFeb 5, 1985
Fuel control apparatus for internal combustion engine
HITACHI LTD3 citations63
Showing the top 50 of 54 patents by PatentIndex Score.