Document Type and Number:
Japanese Patent JPS4995621
Kind Code:
A
Application Number:
JP11526073A
Publication Date:
September 11, 1974
Filing Date:
October 13, 1973
Export Citation:
International Classes:
G03B17/00; G03B9/58; G03B17/42; G03B19/12; (IPC1-7): G03B19/12