Document Type and Number:
Japanese Patent JPS518572
Kind Code:
B1
Application Number:
JP11865270A
Publication Date:
March 18, 1976
Filing Date:
December 26, 1970
Export Citation:
International Classes:
G03B31/04; G03B21/00; G03B31/00; G03B31/06; (IPC1-7): G03B21/00; G03B31/00
Next Patent: JPH0518573