Tatsuya Watanabe

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Method for forming a transparent protective coating on a photograph...
- Patent number 4,060,441
- Issue date Nov 29, 1977
- Kabushiki Kaisha Ricoh
- Wasaburo Ohta
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL