Inventor
ISHIKAWA HIDEKI
JP31 patents
⚠️ This page may combine multiple inventors who share the name “ISHIKAWA HIDEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK SPARK PLUG CO
15 patentsUS6418782B1Jul 16, 2002
Gas concentration sensor
NGK SPARK PLUG CO27 citations93
US6568281B1May 27, 2003
Ultrasonic-wave propagation-time measuring method, gas-pressure measuring method, gas-flow rate measuring method, and gas sensor
NGK SPARK PLUG CO22 citations92
US6308572B1Oct 30, 2001
Gas concentration sensor
NGK SPARK PLUG CO40 citations92
US6568240B1May 27, 2003
Method and apparatus using a gas concentration sensor for accurately controlling an air fuel ratio in an internal combustion engine
NGK SPARK PLUG CO15 citations84
US6886412B2May 3, 2005
Ultrasonic-wave propagation-time measuring method and gas concentration sensor
NGK SPARK PLUG CO7 citations73
US7082810B2Aug 1, 2006
Gas sensor
NGK SPARK PLUG CO9 citations72
US7416651B2Aug 26, 2008
Gas sensor
NGK SPARK PLUG CO2 citations63
US7492075B2Feb 17, 2009
Multilayer piezoelectric element, fuel injector having the piezoelectric element and piezoelectric element production method
NGK SPARK PLUG CO2 citations61
US6892565B2May 17, 2005
Gas sensor and gas concentration detecting device
NGK SPARK PLUG CO4 citations59
US7080543B2Jul 25, 2006
Sensor and method for manufacturing the same
NGK SPARK PLUG CO1 citations52
US6892566B2May 17, 2005
Gas concentration sensor
NGK SPARK PLUG CO0 citations41
US9761888B2Sep 12, 2017
Fuel cell
NGK SPARK PLUG CO0 citations40
US10224555B2Mar 5, 2019
Fuel cell
NGK SPARK PLUG CO0 citations38
US10665872B2May 26, 2020
Fuel cell stack and method for manufacturing fuel cell stack
NGK SPARK PLUG CO0 citations33
US10224553B2Mar 5, 2019
Fuel cell comprising connection members having different thickness for each of cell units and method for manufacturing same
NGK SPARK PLUG CO0 citations31
SEIKO INSTR INC
5 patentsUS5395711AMar 7, 1995
Non-aqueous electrolyte secondary battery and its production method
SEIKO INSTR INC222 citations98
USRE35818EJun 2, 1998
Non-aqueous electrolyte secondary battery and method of producing the same
SEIKO INSTR INC27 citations92
US5620812AApr 15, 1997
Non-aqueous electrolyte secondary battery
SEIKO INSTR INC44 citations92
US5506075AApr 9, 1996
Non-aqueous electrolyte secondary battery and method of producing the same
SEIKO INSTR INC49 citations92
US5401599AMar 28, 1995
Non-aqueous electrolyte secondary battery and method of producing the same
SEIKO INSTR INC49 citations92