TREA

Oval Engineering Co., Ltd.

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Small volume prover
    • Patent number 5,392,632
    • Issue date Feb 28, 1995
    • Oval Engineering Co.,Ltd.
    • Nobuyoshi Umeda
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Flowmeter proving apparatus
    • Patent number 5,317,895
    • Issue date Jun 7, 1994
    • Oval Engineering Co., Ltd.
    • Yutaka Ogawa
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Thermal type flowmeter
    • Patent number 5,222,395
    • Issue date Jun 29, 1993
    • Oval Engineering Co., Ltd.
    • Naoki Matubara
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flowmeter
    • Patent number 5,193,399
    • Issue date Mar 16, 1993
    • Oval Engineering Co., Ltd.
    • Hideo Kumano
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Calorimeter
    • Patent number 5,167,450
    • Issue date Dec 1, 1992
    • Tokyo Gas Co., Ltd.
    • Kazumitu Nukui
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,977,781
    • Issue date Dec 18, 1990
    • Oval Engineering Co., Ltd.
    • Masao Misumi
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Ultrasonic fuel injection nozzle
    • Patent number 4,974,780
    • Issue date Dec 4, 1990
    • Toa Nenryo Kogyo K.K.
    • Hiromi Nakamura
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Karman's vortex flow meter
    • Patent number 4,970,902
    • Issue date Nov 20, 1990
    • Mitsubishi Denki Kabushiki Kaisha
    • Masao Misumi
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Elastic tubing pump
    • Patent number 4,969,808
    • Issue date Nov 13, 1990
    • Oval Engineering Co., Ltd.
    • Akira Tsukada
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,891,989
    • Issue date Jan 9, 1990
    • Oval Engineering Co., Ltd.
    • Masao Misumi
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,838,092
    • Issue date Jun 13, 1989
    • Oval Engineering Co., Ltd.
    • Masao Misumi
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,683,760
    • Issue date Aug 4, 1987
    • Oval Engineering Co., Ltd.
    • Masao Misumi
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,627,295
    • Issue date Dec 9, 1986
    • Oval Engineering Co., Ltd.
    • Naoki Matsubara
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Vortex flow meter
    • Patent number 4,625,564
    • Issue date Dec 2, 1986
    • Oval Engineering Co., Ltd.
    • Hideo Murakami
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Oscillation compensating apparatus for vortex flow meter
    • Patent number 4,526,040
    • Issue date Jul 2, 1985
    • Oval Engineering Co., Ltd.
    • Naoki Matsubara
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Electrode connections for a piezoelectric sensor
    • Patent number 4,511,819
    • Issue date Apr 16, 1985
    • Oval Engineering Co., Ltd.
    • Naoki Matsubara
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Flow meter utilizing Karman vortex street
    • Patent number 4,392,385
    • Issue date Jul 12, 1983
    • Oval Engineering Co., Ltd.
    • Kuniteru Okuda
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Gaseous fluid flow meter utilizing karman vortex street
    • Patent number 4,380,934
    • Issue date Apr 26, 1983
    • Oval Engineering Co., Ltd.
    • Kuniteru Okuda
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Flow meter with helical toothed rotors having no pulsation and zero...
    • Patent number 4,329,130
    • Issue date May 11, 1982
    • Oval Engineering Company Limited
    • Shigeyoshi Nagata
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Positive displacement flow meter with helical-toothed rotors
    • Patent number 4,224,015
    • Issue date Sep 23, 1980
    • Oval Engineering Co., Ltd.
    • Shigeyoshi Nagata
    • G01 - MEASURING TESTING

Trademarklast 30 trademarks

  • Information Trademark

    74339429
    • Serial number 74339429
    • Registration number 2050084
    • Filing date Dec 14, 1992
    • OVAL ENGINEERING CO., LTD.
    • 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments