Document Type and Number:
Japanese Patent JPS5253738
Kind Code:
U
Application Number:
JP14129475U
Publication Date:
April 18, 1977
Filing Date:
October 16, 1975
Export Citation:
International Classes:
G03B1/42; G03B1/48; G03B1/56; G03B17/28; (IPC1-7): G03B1/56
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