Document Type and Number:
Japanese Patent JPS55144360
Kind Code:
U
Application Number:
JP4447379U
Publication Date:
October 16, 1980
Filing Date:
April 03, 1979
Export Citation:
International Classes:
G09B11/10; (IPC1-7): G09B11/10
Domestic Patent References:
JPS5313498U | 1978-02-03 |