Document Type and Number:
Japanese Patent JPS5757433
Kind Code:
U
Application Number:
JP13504180U
Publication Date:
April 05, 1982
Filing Date:
September 22, 1980
Export Citation:
International Classes:
G03B1/00; G03B1/14; G03B17/42; G03B19/12; (IPC1-7): G03B19/12; G03B1/14