Yoshio Hara

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Paint used in forming a magnetic recording medium backcoat layer
- Patent number 5,868,825
- Issue date Feb 9, 1999
- Toyo Ink Manufacturing Co., Ltd.
- Yoshio Hara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium having a backcoat layer containing carbon...
- Patent number 5,637,405
- Issue date Jun 10, 1997
- Toyo Ink Manufacturing Co. Ltd.
- Yoshio Hara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium having a backcoat layer containing a tran...
- Patent number 5,601,914
- Issue date Feb 11, 1997
- Toyo Ink Manufacturing Co., Ltd.
- Michio Yabuno
- G11 - INFORMATION STORAGE