Tetsuya Sumitomo

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of making an internal grooved tube
- Patent number 6,913,074
- Issue date Jul 5, 2005
- The Furukawa Electric Co., Ltd.
- Koji Yamamoto
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Apparatus for manufacturing internal grooved tube
- Patent number 6,470,723
- Issue date Oct 29, 2002
- The Furukawa Electric Co., Ltd.
- Tetsuya Sumitomo
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
Method of making an internal grooved tube
- Publication number 20040049917
- Publication date Mar 18, 2004
- Koji Yamamoto
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Apparatus for manufacturing internal grooved tube
- Publication number 20020104350
- Publication date Aug 8, 2002
- Tetsuya Sumitomo
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
Internal grooved tube and manufacturing method thereof
- Publication number 20010027859
- Publication date Oct 11, 2001
- Koji Yamamoto
- F28 - HEAT EXCHANGE IN GENERAL