Document Type and Number:
Japanese Patent JPS4831392
Kind Code:
A
Application Number:
JP6543171A
Publication Date:
April 24, 1973
Filing Date:
August 26, 1971
Export Citation:
International Classes:
G09F11/22; E01F9/00; G08G1/07; G08G1/09; G09F11/00; (IPC1-7): G08G1/09