TREA

Hirai Engineering Corporation

Follow

Organization

  • Tokyo, JP
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Roof system utilizing a solar cell
    • Patent number 5,706,617
    • Issue date Jan 13, 1998
    • Hirai Engineering Corporation
    • Takashi Hirai
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Roof mounted light transmitting frame
    • Patent number 5,531,049
    • Issue date Jul 2, 1996
    • Hirai Engineering Corporation
    • Takashi Hirai
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Roof system utilizing a solar cell
    • Patent number 5,497,587
    • Issue date Mar 12, 1996
    • Hirai Engineering Corporation
    • Takashi Hirai
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Roof
    • Patent number 5,406,936
    • Issue date Apr 18, 1995
    • Hirai Engineering Corporation
    • Takashi Hirai
    • F24 - HEATING RANGES VENTILATING
  • Information Patent Grant

    Roof apparatus
    • Patent number 5,367,843
    • Issue date Nov 29, 1994
    • Hirai Engineering Corporation
    • Takashi Hirai
    • F24 - HEATING RANGES VENTILATING