Inventor · disambiguated record
Keizou Ohtsuka
Also filed as: OHTSUKA KEIZOU
10 granted patents·305 citations·filing 1980–1994
92Inventor score
Files withHITACHI LTD10
Top patents by PatentIndex Score
10 records- 0188US5563003AFuel cell and supplementary electrolyte container and method for supplementing fuel cell with electrolyteHITACHI LTD·Filed 1994·Granted Oct 8, 1996·65 cites·23 claims
- 0287US4653998AFurnace systemHITACHI LTD·Filed 1985·Granted Mar 31, 1987·51 cites·8 claims
- 0379US5212022AInternal-reforming fuel cells and power stations using the sameHITACHI LTD·Filed 1990·Granted May 18, 1993·63 cites·20 claims
- 0470US4781996AFuel cellHITACHI LTD·Filed 1987·Granted Nov 1, 1988·27 cites·8 claims
- 0568US4741279AMethod of and apparatus for combusting coal-water mixtureHITACHI LTD·Filed 1987·Granted May 3, 1988·26 cites·13 claims
- 0667US4515094AFuel jet method and apparatus for pulverized coal burnerHITACHI LTD·Filed 1983·Granted May 7, 1985·20 cites·1 claims
- 0762US4364032AMethod and apparatus for diagnosing local overheating in a rotary electric machineHITACHI LTD·Filed 1980·Granted Dec 14, 1982·18 cites·6 claims
- 0861US4436699AMonitoring system for checking electric rotary machine for local overheatingHITACHI LTD·Filed 1981·Granted Mar 13, 1984·17 cites·2 claims
- 0948US4902587AFuel cellHITACHI LTD·Filed 1989·Granted Feb 20, 1990·11 cites·8 claims
- 1031US5213909AInsulated fuel cellHITACHI LTD·Filed 1992·Granted May 25, 1993·7 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →