Document Type and Number:
Japanese Patent JPS4838942
Kind Code:
U
Application Number:
JP8084771U
Publication Date:
May 15, 1973
Filing Date:
September 08, 1971
Export Citation:
International Classes:
G09B5/06; G03B31/00; G03B31/06; G09B5/00; (IPC1-7): G09B5/00; G03B31/00
Domestic Patent References:
| JPS5036985U | 1975-04-17 |