Inventor · disambiguated record
Hirofumi Kotaka
Also filed as: KOTAKA HIROFUMI
4 granted patents·38 citations·filing 1984–1998
74Inventor score
Top patents by PatentIndex Score
4 records- 0150US6647777B1Flow rate sensor, flow meter, and discharge rate control apparatus for liquid discharge machinesMITSUI MINING & SMELTING CO·Filed 1998·Granted Nov 18, 2003·17 cites·55 claims
- 0241US4697994AMultistage discharge type rotary vacuum pumpSEIKO SEIKI KK·Filed 1984·Granted Oct 6, 1987·9 cites·5 claims
- 0338US4622823AGas refrigeratorSEIKO SEIKI KK·Filed 1984·Granted Nov 18, 1986·10 cites·14 claims
- 0425US5136851AHelium gas compressing apparatusSEIKO SEIKI KK·Filed 1990·Granted Aug 11, 1992·2 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →