Ikuo Tokunaga

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Suwa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Bonding structure for timepieces
- Patent number 4,763,312
- Issue date Aug 9, 1988
- Seiko Epson Corporation
- Ikuo Tokunaga
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Wristwatch with sound-making device
- Patent number 4,180,970
- Issue date Jan 1, 1980
- Kabushiki Kaisha Suwa Seikosha
- Ikuo Tokunaga
- G04 - HOROLOGY