Document Type and Number:
Japanese Patent JPS5260335
Kind Code:
U
Application Number:
JP14723575U
Publication Date:
May 02, 1977
Filing Date:
October 29, 1975
Export Citation:
International Classes:
H04R1/02; G03B21/56; G03B31/00; H04R1/00; (IPC1-7): G03B21/56; H04R1/00
Domestic Patent References:
| JPS244140Y1 | ||||
| JPS4858833A | 1973-08-17 |