Document Type and Number:
Japanese Patent JPS5417408
Kind Code:
Y2
Application Number:
JP13800572U
Publication Date:
July 05, 1979
Filing Date:
November 30, 1972
Export Citation:
International Classes:
G03B31/04; G03B31/00; G11B31/00; H03J1/02; (IPC1-7): G03B31/04; G11B31/00