Document Type and Number:
Japanese Patent JPS5181733
Kind Code:
U
Application Number:
JP15454374U
Publication Date:
June 30, 1976
Filing Date:
December 21, 1974
Export Citation:
International Classes:
G03B23/10; G03B21/00; (IPC1-7): G03B21/00
Domestic Patent References:
| JPS437337Y1 | 1968-04-01 | |||
| JPS437338Y1 | 1968-04-01 |
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