Sadao Umezawa

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Patents Grantslast 30 patents

Information Patent Grant
Color cathode ray tube having deformation-resistant shadow mask
- Patent number 6,552,481
- Issue date Apr 22, 2003
- Hitachi Ltd.
- Takeharu Furusawa
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Color cathode ray tube
- Publication number 20010007408
- Publication date Jul 12, 2001
- Takeharu Furusawa
- H01 - BASIC ELECTRIC ELEMENTS