Document Type and Number:
Japanese Patent JPS5132541
Kind Code:
U
Application Number:
JP9751174U
Publication Date:
March 10, 1976
Filing Date:
August 16, 1974
Export Citation:
International Classes:
G03B21/64; G03B21/00; G03B31/06; (IPC1-7): G03B21/64; G03B21/00