Document Type and Number:
Japanese Patent JPS563702
Kind Code:
Y2
Application Number:
JP3690874U
Publication Date:
January 27, 1981
Filing Date:
March 30, 1974
Export Citation:
International Classes:
G03B21/00; G03B31/00; G03D15/00; (IPC1-7): G03B31/00
Next Patent: COMMUNICATION NETWORK CONTROLLER