Document Type and Number:
Japanese Patent JPH025113
Kind Code:
U
Application Number:
JP8125788U
Publication Date:
January 12, 1990
Filing Date:
June 20, 1988
Export Citation:
International Classes:
G02B7/00; G11B7/08; G11B7/135; (IPC1-7): G11B7/08; G02B7/00; G11B7/135
Domestic Patent References:
| JPS5313905A | 1978-02-08 | |||
| JPS5817550A | 1983-02-01 |
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