Terutoshi Ichihara

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cathode ray tube having an improved indirectly heated cathode
- Patent number 6,492,768
- Issue date Dec 10, 2002
- Hitachi, Ltd.
- Sachio Koizumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Heater for indirectly-heated cathode
- Patent number 5,038,071
- Issue date Aug 6, 1991
- Hitachi, Ltd.
- Sachio Koizumi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of producing dark heater
- Patent number 4,844,942
- Issue date Jul 4, 1989
- Hitachi, Ltd.
- Sachio Koizumi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...