Takehiko Okushima

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Yashio, JP

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Patents Grantslast 30 patents

Information Patent Grant
Closure plate for covering opening of floor panels
- Patent number 5,162,612
- Issue date Nov 10, 1992
- Naka Corporation
- Hiromasa Naka
- E04 - BUILDING
Information Patent Grant
Device for fixing floor panels
- Patent number 5,072,557
- Issue date Dec 17, 1991
- Naka Corporation
- Hiromasa Naka
- E04 - BUILDING
Information Patent Grant
Device and structure for supporting floor panels
- Patent number 4,996,804
- Issue date Mar 5, 1991
- Naka Corporation
- Hiromasa Naka
- E04 - BUILDING
Information Patent Grant
Free access floor and method of constructing the same
- Patent number 4,922,670
- Issue date May 8, 1990
- Naka Technical Laboratory
- Hiromasa 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