Document Type and Number:
Japanese Patent JPS5394157
Kind Code:
U
Application Number:
JP17688976U
Publication Date:
August 01, 1978
Filing Date:
December 29, 1976
Export Citation:
International Classes:
G04B23/03; G04B23/02; (IPC1-7): G04B23/02
Foreign References:
| GB906872A | 1962-09-26 |