Koichi Maruyama

Follow

Person

Matsuzawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Color picture tube with internal funnel shaped magnetic shield
- Patent number 4,229,675
- Issue date Oct 21, 1980
- Hitachi, Ltd.
- Takeshi Matsuki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Color misalignment correction device for color picture tube
- Patent number 4,145,677
- Issue date Mar 20, 1979
- Hitachi, Ltd.
- Koichi Maruyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Color picture tube
- Patent number 4,142,131
- Issue date Feb 27, 1979
- Hitachi, Ltd.
- Kunio Ando
- H01 - BASIC ELECTRIC ELEMENTS