Inventor · disambiguated record
Katsumi Matsubara
Also filed as: ARAI HAJIME · MATSUBARA KATSUMI
11 granted patents·412 citations·filing 1977–1999
93Inventor score
Files withHITACHI LTD11
Top patents by PatentIndex Score
11 records- 0194US4664601AOperation control system of rotary displacement type vacuum pumpHITACHI LTD·Filed 1985·Granted May 12, 1987·64 cites·9 claims
- 0293US4984974AScrew type vacuum pump with introduced inert gasHITACHI LTD·Filed 1988·Granted Jan 15, 1991·65 cites·8 claims
- 0392US4174196AScrew fluid machineHITACHI LTD·Filed 1977·Granted Nov 13, 1979·46 cites·14 claims
- 0481US6253567B1Ice thermal storage type air conditioner and ice thermal storage tankHITACHI LTD·Filed 1999·Granted Jul 3, 2001·69 cites·12 claims
- 0580US4557679ARotary fluid machine with thrust bearing mounting unitHITACHI LTD·Filed 1984·Granted Dec 10, 1985·29 cites·17 claims
- 0679US5314321AScrew-type rotary fluid machine including rotors having treated surfacesHITACHI LTD·Filed 1992·Granted May 24, 1994·39 cites·4 claims
- 0778US4714418AScrew type vacuum pumpHITACHI LTD·Filed 1985·Granted Dec 22, 1987·31 cites·19 claims
- 0869US5223052AMethod of treating surfaces of rotors of the screw type rotary machineHITACHI LTD·Filed 1991·Granted Jun 29, 1993·27 cites·8 claims
- 0968US4234296AScrew compressorHITACHI LTD·Filed 1979·Granted Nov 18, 1980·17 cites·4 claims
- 1055US4773835AScroll type pump with wrap curve offset for thermal expansionHITACHI LTD·Filed 1987·Granted Sep 27, 1988·16 cites·14 claims
- 1139US6101837AIce thermal storage type air-conditioner and ice thermal storage tankHITACHI LTD·Filed 1999·Granted Aug 15, 2000·9 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →