Yuji Sakai

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Nakai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Metal tube and apparatus and method for manufacturing the same
- Patent number 4,321,816
- Issue date Mar 30, 1982
- Kyodo Insatsu Kabushiki Kaisha
- Yoshihiko Nakahara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Collapsible tube and method of manufacture
- Patent number 4,200,051
- Issue date Apr 29, 1980
- Kyodo Insatsu Kabushiki Kaisha
- Yoshihiko Nakahara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...