Document Type and Number:
Japanese Patent JPS4918257
Kind Code:
B1
Application Number:
JP1439466A
Publication Date:
May 09, 1974
Filing Date:
March 10, 1966
Export Citation:
International Classes:
G03B15/00; G03B21/00; G03B31/00; G03B31/04; G03B35/00; G03B41/02; G03C5/04; (IPC1-7): G03C5/04; G03B31/04; G03B41/02