Riken Keikinzoku Kogyo Kabushiki Kaishi

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Shizuoka, JA

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing extruded structural profiles from aluminum...
- Patent number 4,028,795
- Issue date Jun 14, 1977
- Riken Keikinzoku Kogyo Kabushiki Kaishi
- Toshiro Takahashi
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...