Akihiko Hirayama

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Onoda, JP

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Patents Grantslast 30 patents

Information Patent Grant
Plate-like barium ferrite particles suitable for use in magnetic re...
- Patent number 4,851,292
- Issue date Jul 25, 1989
- Toda Kogyo Corp.
- Norimichi Nagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Plate-like barium ferrite particles suitable for use in magnetic re...
- Patent number 4,806,429
- Issue date Feb 21, 1989
- Toda Kogyo Corporation
- Norimichi Nagai
- G11 - INFORMATION STORAGE
Information Patent Grant
Plate-like magnetoplumbite ferrite particles for magnetic recording...
- Patent number 4,781,981
- Issue date Nov 1, 1988
- Toda Kogyo Corp.
- Tsutomu Katamoto
- G11 - INFORMATION STORAGE