Document Type and Number:
Japanese Patent JPS54182032
Kind Code:
U
Application Number:
JP8063278U
Publication Date:
December 24, 1979
Filing Date:
June 13, 1978
Export Citation:
International Classes:
G09B11/00; G09B1/02; G09B19/00; (IPC1-7): G09B19/00
Domestic Patent References:
| JP8017135U |