Inventor · disambiguated record
Tsutomu Okayama
Also filed as: MATSUOKA YOSHITAKA · OKAYAMA TSUTOMU
13 granted patents·330 citations·filing 1976–2006
93Inventor score
Top patents by PatentIndex Score
13 records- 0182US5347193ASpark plug having an erosion resistant tipNGK SPARK PLUG CO·Filed 1992·Granted Sep 13, 1994·61 cites·4 claims
- 0279US4173148ASemiconductor strain gauge with temperature compensatorHITACHI LTD·Filed 1978·Granted Nov 6, 1979·27 cites·7 claims
- 0378US5440198ASpark plug having a noble metal firing tip bonded to a front end of a center electrodeNGK SPARK PLUG CO·Filed 1993·Granted Aug 8, 1995·49 cites·4 claims
- 0478US5273474AMethod of manufacturing a center electrode for a spark plugNGK SPARK PLUG CO·Filed 1992·Granted Dec 28, 1993·49 cites·11 claims
- 0576US4362060ADisplacement transducerHITACHI LTD·Filed 1980·Granted Dec 7, 1982·33 cites·15 claims
- 0673US5869921ASpark plug for internal combustion engine having platinum and iridium alloyed emissive tipsNGK SPARK PLUG CO·Filed 1997·Granted Feb 9, 1999·24 cites·3 claims
- 0765US5320569AMethod of making a spark plugNGK SPARK PLUG CO·Filed 1993·Granted Jun 14, 1994·28 cites·6 claims
- 0865US4264889APressure transducerHITACHI LTD·Filed 1980·Granted Apr 28, 1981·20 cites·9 claims
- 0961US7521998B2Operational amplifier and scanning electron microscope using the sameHITACHI HIGH TECH CORP·Filed 2006·Granted Apr 21, 2009·4 cites·10 claims
- 1051US4570498ADifferential pressure measuring transducer assemblyHITACHI LTD·Filed 1984·Granted Feb 18, 1986·12 cites·6 claims
- 1149US4071823ATwo-wire type amplifierHITACHI LTD·Filed 1976·Granted Jan 31, 1978·8 cites·5 claims
- 1246US4507600ATwo-terminal current regulatorHITACHI LTD·Filed 1983·Granted Mar 26, 1985·8 cites·14 claims
- 1335US5224026AAlternatable constant current circuitHITACHI LTD·Filed 1992·Granted Jun 29, 1993·7 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →