Document Type and Number:
Japanese Patent JPS5284216
Kind Code:
U
Application Number:
JP17302075U
Publication Date:
June 23, 1977
Filing Date:
December 19, 1975
Export Citation:
International Classes:
G03B21/54; G03B23/02; G11B23/08; G11B23/087; (IPC1-7): G11B23/08; G03B23/02
Domestic Patent References:
| JP50135118B | ||||
| JP50150313B |
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