Kenichi Ehara

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Shibukawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thermionic cathode structure
- Patent number 4,878,866
- Issue date Nov 7, 1989
- Denki Kagaku Kogyo Kabushiki Kaisha
- Yoshiharu Mori
- H01 - BASIC ELECTRIC ELEMENTS