Yutaka Asai

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Escape for a building
- Patent number 5,025,891
- Issue date Jun 25, 1991
- Naka Technical Laboratory
- Hiromitsu Naka
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS