Inventor · disambiguated record
Hisao Koizumi
Also filed as: KOIZUMI HISAO
12 granted patents·1 pending application·446 citations·filing 1976–2021
92Inventor score
Files withTOKYO SHIBAURA ELECTRIC CO4SAKAI CHEMICAL INDUSTRY CO3CHUBU ELECTRIC POWER2MITSUBISHI ELECTRIC CORP2TOSHIBA KK2
Top patents by PatentIndex Score
13 records- 0194US5203399AHeat transfer apparatusTOSHIBA KK·Filed 1991·Granted Apr 20, 1993·196 cites·5 claims
- 0283US4137898AAir type solar heating systemTOKYO SHIBAURA ELECTRIC CO·Filed 1976·Granted Feb 6, 1979·43 cites·12 claims
- 0382US4108155AHot air type solar heat-collecting apparatusTOKYO SHIBAURA ELECTRIC CO·Filed 1976·Granted Aug 22, 1978·41 cites·12 claims
- 0479US5006689AVacuum insulated storage-type electric water heater having an external bubble pump heating unitCHUBU ELECTRIC POWER·Filed 1988·Granted Apr 9, 1991·39 cites·7 claims
- 0570US4818845AStorage type electric water heater having a closed circulation loop provided with a bubble pumpTOSHIBA KK·Filed 1987·Granted Apr 4, 1989·27 cites·14 claims
- 0669US5864374AMethod and apparatus for image generationMITSUBISHI ELECTRIC CORP·Filed 1996·Granted Jan 26, 1999·42 cites·12 claims
- 0760US12281019B2Boron-containing amorphous silica powder and method of producing sameSAKAI CHEMICAL INDUSTRY CO·Filed 2021·Granted Apr 22, 2025·0 cites·12 claims
- 0860US4959526AStorage type electric water heater having a closed circulation loop with a bubble pumpCHUBU ELECTRIC POWER·Filed 1988·Granted Sep 25, 1990·20 cites·21 claims
- 0955US2024002240A1Boron-containing silica dispersion, and method for producing sameSAKAI CHEMICAL INDUSTRY CO·Filed 2021·Application pending·0 cites
- 1051US4282860AHot air type solar heat-collecting apparatusTOKYO SHIBAURA ELECTRIC CO·Filed 1979·Granted Aug 11, 1981·17 cites·9 claims
- 1148US5663775AVideo projector with luminance and chrominance optical modulation LCD'sMITSUBISHI ELECTRIC CORP·Filed 1995·Granted Sep 2, 1997·14 cites·21 claims
- 1244US11020331B2CosmeticSAKAI CHEMICAL INDUSTRY CO·Filed 2018·Granted Jun 1, 2021·0 cites·7 claims
- 1339US4135491ADwellings equipped with a room-heating device and hot water feeder based on solar heatTOKYO SHIBAURA ELECTRIC CO·Filed 1976·Granted Jan 23, 1979·7 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →