Shinji Umeki

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic powder material comprising iron oxide particles with a cop...
- Patent number 4,069,367
- Issue date Jan 17, 1978
- TDK Electronics Company, Limited
- Shinji Umeki
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method of making powdered magnetic iron oxide material
- Patent number 4,067,755
- Issue date Jan 10, 1978
- TDK Electronics Company, Ltd.
- Shinji Umeki
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic powder
- Patent number 4,010,310
- Issue date Mar 1, 1977
- TDK Electronics Company, Limited
- Yuichi Kubota
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium comprising cobalt or cobalt alloy coated...
- Patent number 3,977,985
- Issue date Aug 31, 1976
- TDK Electronics Company, Limited
- Shinji Umeki
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Process for the production of powdered magnetic material
- Patent number 3,958,068
- Issue date May 18, 1976
- TDK Electronics Company, Limited
- Shinji Umeki
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Magnetic recording medium and preparation thereof
- Patent number 3,953,656
- Issue date Apr 27, 1976
- TDK Electronic Company
- Yasumichi Tokuoka
- G11 - INFORMATION STORAGE