Document Type and Number:
Japanese Patent JPS5299310
Kind Code:
U
Application Number:
JP747176U
Publication Date:
July 27, 1977
Filing Date:
January 26, 1976
Export Citation:
International Classes:
G03B21/54; G03B1/00; G11B23/08; G11B23/087; (IPC1-7): G03B1/00; G11B23/08
Domestic Patent References:
| JPS4710518B1 | ||||
| JP49049911B | ||||
| JP50145326B |
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