TREA

Masao Ishikawa

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Patents Grantslast 30 patents

  • Information Patent Grant

    Counterbalancing unit
    • Patent number 5,553,821
    • Issue date Sep 10, 1996
    • Heiwa Seiki Kogyo Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sliding plate for securing camera
    • Patent number 5,429,332
    • Issue date Jul 4, 1995
    • Heiwa Seiki Kogyo Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tripod head
    • Patent number 5,419,520
    • Issue date May 30, 1995
    • Heiwa Seiki Kogyo Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Panning braking device for tripod head
    • Patent number 5,415,254
    • Issue date May 16, 1995
    • Heiwa Seiki Kagya Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Weight balancer for tripod head
    • Patent number 5,413,295
    • Issue date May 9, 1995
    • Heiwa Seiki Kagya Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Tripod head
    • Patent number 4,979,709
    • Issue date Dec 25, 1990
    • Heiwa Seiki Kogyo Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Vertical tilting apparatus of tripod head
    • Patent number 4,959,671
    • Issue date Sep 25, 1990
    • Heiwa Seiki Kogyo Co., Ltd.
    • Masao Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...