Document Type and Number:
Japanese Patent JPS4917346
Kind Code:
U
Application Number:
JP5684172U
Publication Date:
February 14, 1974
Filing Date:
May 17, 1972
Export Citation:
International Classes:
G09B19/24; G09B19/10; (IPC1-7): G09B19/10
Domestic Patent References:
| JPS479481U | 1972-10-04 |