Koichi Ishii

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Ako, JP

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Patents Grantslast 30 patents

Information Patent Grant
Device for optically detecting a chemical change in fluid
- Patent number 5,218,212
- Issue date Jun 8, 1993
- Mitsubishi Denki Kabushiki Kaisha
- Susumu Sato
- G01 - MEASURING TESTING
Information Patent Grant
Optical color change device for detecting electrical abnormality
- Patent number 5,075,544
- Issue date Dec 24, 1991
- Mitsubishi Denki Kabushiki Kaisha
- Susumu Sato
- G01 - MEASURING TESTING
Information Patent Grant
Phase-shifting transformer with a six-phase core
- Patent number 5,003,277
- Issue date Mar 26, 1991
- Mitsubishi Denki Kabushiki Kaisha
- Katsuji Sokai
- H01 - BASIC ELECTRIC ELEMENTS