Document Type and Number:
Japanese Patent JPS54135931
Kind Code:
U
Application Number:
JP3278778U
Publication Date:
September 20, 1979
Filing Date:
March 15, 1978
Export Citation:
International Classes:
H04R11/00; H04R11/02; (IPC1-7): H04R11/02
Domestic Patent References:
| JP50083568B | ||||
| JPS4730788A | ||||
| JPS4968282A | 1974-07-02 |