Akira Nakahira

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Patents Grantslast 30 patents

Information Patent Grant
Roll for use in heat treating furnace and method of producing the same
- Patent number 5,161,306
- Issue date Nov 10, 1992
- Tocalo Co., Ltd.
- Akira Nakahira
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Roll for use in heat treating furnace and method of producing the same
- Patent number 5,070,587
- Issue date Dec 10, 1991
- Tocalo Co., Ltd.
- Akira Nakahira
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...