Junichi Nakaoka

Person

Amagasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Composite magnetic head
- Patent number 4,953,051
- Issue date Aug 28, 1990
- Sumitomo Special Metal Co. Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE
Information Patent Grant
Grooved magnetic substrates and method for producing the same
- Patent number 4,875,987
- Issue date Oct 24, 1989
- Sumitomo Special Metals, Co., Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for producing substrate member for magnetic recording disc
- Patent number 4,816,128
- Issue date Mar 28, 1989
- Sumitomo Special Metals Co., Ltd.
- Toshiaki Wada
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Magnetic recording disc and process for producing the same
- Patent number 4,808,455
- Issue date Feb 28, 1989
- Sumitomo Special Metals Co., Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE
Information Patent Grant
Arrangement for mechanically and accurately processing a workpiece...
- Patent number 4,794,736
- Issue date Jan 3, 1989
- Citizen Watch Co., Ltd.
- Shigehiro Fuwa
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Grooved magnetic substrates and method for producing the same
- Patent number 4,777,074
- Issue date Oct 11, 1988
- Sumitomo Special Metals Co., Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording disk substrate members and process for producing same
- Patent number 4,690,846
- Issue date Sep 1, 1987
- Sumitomo Special Metals Co., Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE
Information Patent Grant
Grooved magnetic substrates and method for producing the same
- Patent number 4,636,420
- Issue date Jan 13, 1987
- Sumitomo Special Metals Co., Ltd.
- Toshiaki Wada
- G11 - INFORMATION STORAGE

Junichi Nakaoka

Person

Patents Grantslast 30 patents

Composite magnetic head

Grooved magnetic substrates and method for producing the same

Process for producing substrate member for magnetic recording disc

Magnetic recording disc and process for producing the same

Arrangement for mechanically and accurately processing a workpiece...

Grooved magnetic substrates and method for producing the same

Recording disk substrate members and process for producing same

Grooved magnetic substrates and method for producing the same