TREA

Kabushiki Kaisha Naka Gijutsu Kenkyusho

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  • Sapporo, JP
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Ceiling construction
    • Patent number 4,843,789
    • Issue date Jul 4, 1989
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Top rail for use with handrails
    • Patent number 4,646,490
    • Issue date Mar 3, 1987
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Ceiling construction
    • Patent number 4,619,086
    • Issue date Oct 28, 1986
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Top rail of a handrail
    • Patent number 4,602,766
    • Issue date Jul 29, 1986
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Access door
    • Patent number 4,593,493
    • Issue date Jun 10, 1986
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Ceiling construction
    • Patent number 4,566,233
    • Issue date Jan 28, 1986
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Stair nosing
    • Patent number 4,486,987
    • Issue date Dec 11, 1984
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Stair nosing
    • Patent number 4,455,797
    • Issue date Jun 26, 1984
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING
  • Information Patent Grant

    Access door
    • Patent number D273995
    • Issue date May 22, 1984
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • D25 - Building units and construction elements
  • Information Patent Grant

    Access door
    • Patent number D273994
    • Issue date May 22, 1984
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • D25 - Building units and construction elements
  • Information Patent Grant

    Access door and framing apparatus for the access door's framework
    • Patent number 4,443,973
    • Issue date Apr 24, 1984
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Drawer type emergency escape
    • Patent number 4,244,443
    • Issue date Jan 13, 1981
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Drawer type emergency escape
    • Patent number 4,240,521
    • Issue date Dec 23, 1980
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Top rail for use on railing construction
    • Patent number 4,220,316
    • Issue date Sep 2, 1980
    • Kabushiki Kaisha Naka Gijutsu Kenkyusho
    • Hiromitsu Naka
    • E04 - BUILDING