Inventor · disambiguated record
Kotaro Naya
Also filed as: NAYA KOTARO
6 granted patents·207 citations·filing 1985–1992
87Inventor score
Files withHITACHI LTD6
Top patents by PatentIndex Score
6 records- 0189US4797068AVacuum evacuation systemHITACHI LTD·Filed 1987·Granted Jan 10, 1989·48 cites·9 claims
- 0286US4770609ATwo-stage vacuum pump apparatus and method of operating the sameHITACHI LTD·Filed 1987·Granted Sep 13, 1988·38 cites·5 claims
- 0379US5314321AScrew-type rotary fluid machine including rotors having treated surfacesHITACHI LTD·Filed 1992·Granted May 24, 1994·39 cites·4 claims
- 0478US4714418AScrew type vacuum pumpHITACHI LTD·Filed 1985·Granted Dec 22, 1987·31 cites·19 claims
- 0569US5223052AMethod of treating surfaces of rotors of the screw type rotary machineHITACHI LTD·Filed 1991·Granted Jun 29, 1993·27 cites·8 claims
- 0666US4993930AVacuum pump apparatus and shaft sealing device thereforHITACHI LTD·Filed 1988·Granted Feb 19, 1991·24 cites·9 claims
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