Document Type and Number:
Japanese Patent JPS4940435
Kind Code:
U
Application Number:
JP8139572U
Publication Date:
April 09, 1974
Filing Date:
July 10, 1972
Export Citation:
International Classes:
G03B21/64; B42F17/00; B42F17/02; G03B21/00; G03B21/11; (IPC1-7): G03B21/64