Document Type and Number:
Japanese Patent JPS6176471
Kind Code:
U
Application Number:
JP16159584U
Publication Date:
May 22, 1986
Filing Date:
October 24, 1984
Export Citation:
International Classes:
G09B11/04; (IPC1-7): G09B11/04
Domestic Patent References:
| JPS499358B1 | 1974-03-04 | |||
| JP49124158B |