Assignee
OVAL ENG CO LTD
JP·17 granted patents·314 citations·filing 1978–1993
Top patents by PatentIndex Score
17 records- 0182US4526040AOscillation compensating apparatus for vortex flow meterOVAL ENG CO LTD·Filed 1983·Granted Jul 2, 1985·34 cites·23 claims
- 0282US4329130AFlow meter with helical toothed rotors having no pulsation and zero contact pressureOVAL ENG CO LTD·Filed 1979·Granted May 11, 1982·31 cites·3 claims
- 0381US4224015APositive displacement flow meter with helical-toothed rotorsOVAL ENG CO LTD·Filed 1978·Granted Sep 23, 1980·30 cites·4 claims
- 0471US5392632ASmall volume proverOVAL ENG CO LTD·Filed 1992·Granted Feb 28, 1995·39 cites·12 claims
- 0571US4625564AVortex flow meterOVAL ENG CO LTD·Filed 1984·Granted Dec 2, 1986·22 cites·16 claims
- 0670US5317895AFlowmeter proving apparatusOVAL ENG CO LTD·Filed 1993·Granted Jun 7, 1994·32 cites·6 claims
- 0768US4977781AVortex flow meterOVAL ENG CO LTD·Filed 1989·Granted Dec 18, 1990·20 cites·14 claims
- 0866US4380934AGaseous fluid flow meter utilizing karman vortex streetOVAL ENG CO LTD·Filed 1980·Granted Apr 26, 1983·16 cites·5 claims
- 0963US4969808AElastic tubing pumpOVAL ENG CO LTD·Filed 1989·Granted Nov 13, 1990·18 cites·1 claims
- 1063US4627295AVortex flow meterOVAL ENG CO LTD·Filed 1986·Granted Dec 9, 1986·22 cites·18 claims
- 1160US4683760AVortex flow meterOVAL ENG CO LTD·Filed 1984·Granted Aug 4, 1987·17 cites·11 claims
- 1248US4392385AFlow meter utilizing Karman vortex streetOVAL ENG CO LTD·Filed 1980·Granted Jul 12, 1983·10 cites·1 claims
- 1341US5222395AThermal type flowmeterOVAL ENG CO LTD·Filed 1991·Granted Jun 29, 1993·16 cites·1 claims
- 1432US4511819AElectrode connections for a piezoelectric sensorOVAL ENG CO LTD·Filed 1983·Granted Apr 16, 1985·2 cites·3 claims
- 1528US4891989AVortex flow meterOVAL ENG CO LTD·Filed 1988·Granted Jan 9, 1990·1 cites·6 claims
- 1627US4838092AVortex flow meterOVAL ENG CO LTD·Filed 1987·Granted Jun 13, 1989·1 cites·21 claims
- 1725US5193399AVortex flowmeterOVAL ENG CO LTD·Filed 1991·Granted Mar 16, 1993·3 cites·4 claims
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