Document Type and Number:
Japanese Patent JPS5213845
Kind Code:
U
Application Number:
JP9929375U
Publication Date:
January 31, 1977
Filing Date:
July 17, 1975
Export Citation:
International Classes:
H04R7/02; H04R7/10; (IPC1-7): H04R7/10
Domestic Patent References:
| JPS4030802Y1 |
Foreign References:
| US3111187A | 1963-11-19 |