Document Type and Number:
Japanese Patent JPS63153192
Kind Code:
U
Application Number:
JP4608387U
Publication Date:
October 07, 1988
Filing Date:
March 27, 1987
Export Citation:
International Classes:
G04B23/02; G04C21/16; G04C23/00; G04G13/02; (IPC1-7): G04C21/16; G04B23/02; G04C21/16