Document Type and Number:
Japanese Patent JPH03129976
Kind Code:
U
Application Number:
JP3837690U
Publication Date:
December 26, 1991
Filing Date:
April 10, 1990
Export Citation:
International Classes:
G09B5/06; G06F17/28; G09B5/14; (IPC1-7): G09B5/06; G06F15/38; G09B5/14