Document Type and Number:
Japanese Patent JPS50159735
Kind Code:
A
Application Number:
JP6730774A
Publication Date:
December 24, 1975
Filing Date:
June 13, 1974
Export Citation:
International Classes:
G03B7/28; G03B7/083; G03B7/16; G03B7/17; G03B15/05; (IPC1-7): G03B7/08; G03B7/16; G03B9/62; G03B15/05