Document Type and Number:
Japanese Patent JPS5491153
Kind Code:
U
Application Number:
JP16490377U
Publication Date:
June 27, 1979
Filing Date:
December 08, 1977
Export Citation:
International Classes:
G04B37/10; (IPC1-7): G04B37/10
Domestic Patent References:
| JP51152360B |
Foreign References:
| CH542472A | 1973-06-15 |