Document Type and Number:
Japanese Patent JPS4870753
Kind Code:
U
Application Number:
JP11181671U
Publication Date:
September 06, 1973
Filing Date:
November 30, 1971
Export Citation:
International Classes:
G01V7/00; G09B19/00; G09B23/08; G09B27/00; (IPC1-7): G09B23/08; G09B19/00; G09B27/00