Inventor · disambiguated record
Hajime Kawai
Also filed as: KAWAI HAJIME
14 granted patents·6 pending applications·45 citations·filing 1974–2022
88Inventor score
Files withYAMADA CHEM CO9OMRON TATEISI ELECTRONICS CO8NIPPON CATALYTIC CHEM IND1SUIDEN KABUSHIKI KAISHA1TAISHI YOSHITAKA1
Top patents by PatentIndex Score
20 records- 0163US4814320AHeat-sensitive recording materialYAMADA CHEM CO·Filed 1987·Granted Mar 21, 1989·7 cites·7 claims
- 0257US9405220B2Optical sensor, image forming device, and method for correcting toner concentrationOMRON TATEISI ELECTRONICS CO·Filed 2014·Granted Aug 2, 2016·0 cites·5 claims
- 0357US3942422ARoof ventilatorSUIDEN KABUSHIKI KAISHA·Filed 1974·Granted Mar 9, 1976·17 cites·7 claims
- 0453US4444591AChromogenic compounds and the use thereof as color former in copying or recording materialsYAMADA CHEM CO·Filed 1982·Granted Apr 24, 1984·12 cites·2 claims
- 0552US9927757B2Toner density sensor and image forming deviceOMRON TATEISI ELECTRONICS CO·Filed 2016·Granted Mar 27, 2018·0 cites·15 claims
- 0651US2022089504A1Curing Agent, Method for Producing Cement Structure with Coating Film, Shrinkage Reduction Method and Drying Suppression Method for Cement Molded Body, and Method for Suppressing Penetration of Deterioration Factor into Cement StructureNIPPON CATALYTIC CHEM IND·Filed 2020·Application pending·0 cites
- 0747US2025029796A1Push button switchOMRON TATEISI ELECTRONICS CO·Filed 2022·Application pending·0 cites
- 0846US4835291ADivinyl compounds and chromogenic recording-material prepared by using thereofYAMADA CHEM CO·Filed 1987·Granted May 30, 1989·3 cites·37 claims
- 0945US4564679AChromogenic compoundsYAMADA CHEM CO·Filed 1982·Granted Jan 14, 1986·3 cites·9 claims
- 1043US2023335353A1Push button switchOMRON TATEISI ELECTRONICS CO·Filed 2021·Application pending·0 cites
- 1141US2017268994A1Particle sensor, and electronic device provided with sameOMRON TATEISI ELECTRONICS CO·Filed 2016·Application pending·0 cites
- 1240US8873990B2Toner density sensor and image forming apparatusOMRON TATEISI ELECTRONICS CO·Filed 2012·Granted Oct 28, 2014·0 cites·12 claims
- 1334US4808567ADivinyl compounds and chromogenic recording-material prepared by using thereofYAMADA CHEM CO·Filed 1987·Granted Feb 28, 1989·1 cites·56 claims
- 1434US4747875AChromogenic azaphthalide compound and a colour-forming recording composition containing the sameYAMADA CHEM CO·Filed 1987·Granted May 31, 1988·2 cites·17 claims
- 1531US9594017B2Reflective sensorOMRON TATEISI ELECTRONICS CO·Filed 2015·Granted Mar 14, 2017·0 cites·12 claims
- 1631US2012237246A1Toner density sensor and image forming apparatusTAISHI YOSHITAKA·Filed 2012·Application pending·0 cites
- 1731US2015258687A1Method for detecting components in carrier tape, sensor module, splicing device, and component mounting deviceOMRON TATEISI ELECTRONICS CO·Filed 2015·Application pending·0 cites
- 1829US4845245AProcess for producing 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalideYAMADA CHEM CO·Filed 1987·Granted Jul 4, 1989·0 cites·3 claims
- 1926US5179066AThermosensitive recording materialYAMADA CHEM CO·Filed 1992·Granted Jan 12, 1993·0 cites·3 claims
- 2023US5286702APhthalide compound and recording material using the compoundYAMADA CHEM CO·Filed 1992·Granted Feb 15, 1994·0 cites·3 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →