Document Type and Number:
Japanese Patent JPS4968420
Kind Code:
U
More Like This:
Application Number:
JP11167372U
Publication Date:
June 14, 1974
Filing Date:
September 26, 1972
Export Citation:
International Classes:
H04R1/00; G03B31/00; (IPC1-7): G03B31/00; H04R1/00
Domestic Patent References:
JPS42966Y1 | 1967-01-20 | |||
JPS319209Y1 |