Document Type and Number:
Japanese Patent JPS6432587
Kind Code:
U
Application Number:
JP12576287U
Publication Date:
March 01, 1989
Filing Date:
August 20, 1987
Export Citation:
International Classes:
G06C3/00; G09B29/10; G09F11/04; (IPC1-7): G09F11/04; G06C3/00; G09B29/10
Domestic Patent References:
JP60088770B | ||||
JPS616495U | 1986-01-16 | |||
JPS5640044B2 | 1981-09-17 |