Inventor
YAMADA TETSUSYO
JP24 patents
⚠️ This page may combine multiple inventors who share the name “YAMADA TETSUSYO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK SPARK PLUG CO
23 patentsUS4505807AMar 19, 1985
Oxygen sensor
NGK SPARK PLUG CO94 citations96
US4450065AMay 22, 1984
Oxygen sensor
NGK SPARK PLUG CO81 citations96
US4753203AJun 28, 1988
Air/fuel ratio sensor apparatus for use with internal combustion engine
NGK SPARK PLUG CO27 citations92
US4722779AFeb 2, 1988
Air/fuel ratio sensor
NGK SPARK PLUG CO44 citations92
US4624770ANov 25, 1986
Air-fuel ratio sensor
NGK SPARK PLUG CO28 citations92
US4505806AMar 19, 1985
Oxygen sensor
NGK SPARK PLUG CO43 citations92
US4498968AFeb 12, 1985
Oxygen sensor
NGK SPARK PLUG CO54 citations92
US5110442AMay 5, 1992
Reinforced electrolyte function elements
NGK SPARK PLUG CO27 citations91
US4578172AMar 25, 1986
Air/fuel ratio detector
NGK SPARK PLUG CO40 citations91
US4629549ADec 16, 1986
Oxygen sensor
NGK SPARK PLUG CO21 citations82
US4785150ANov 15, 1988
Plate-like alumina heater
NGK SPARK PLUG CO8 citations74
US5064693ANov 12, 1991
Method of adjusting a gas sensor
NGK SPARK PLUG CO17 citations73
US4836906AJun 6, 1989
Air-fuel ratio sensor
NGK SPARK PLUG CO13 citations73
US4722778AFeb 2, 1988
Gas sensor with gas diffusion chamber between two platy solid electrolyte cells
NGK SPARK PLUG CO8 citations73
US4806739AFeb 21, 1989
Plate-like ceramic heater
NGK SPARK PLUG CO15 citations72
US4615787AOct 7, 1986
Air/fuel ratio detector
NGK SPARK PLUG CO16 citations72
US4591421AMay 27, 1986
Air/fuel ratio detector
NGK SPARK PLUG CO14 citations72
US4578171AMar 25, 1986
Air/fuel ratio detector
NGK SPARK PLUG CO19 citations72
US4839018AJun 13, 1989
Air/fuel ratio detector
NGK SPARK PLUG CO18 citations71
US4935119AJun 19, 1990
Air/fuel ratio sensor
NGK SPARK PLUG CO3 citations63
US4840854AJun 20, 1989
Reinforced plate-like sintered bodies
NGK SPARK PLUG CO6 citations63
US5047137ASep 10, 1991
Solid electrolyte air/fuel ratio sensor with voltage control
NGK SPARK PLUG CO3 citations62
US4792387ADec 20, 1988
Air-fuel ratio detecting device
NGK SPARK PLUG CO2 citations61