Document Type and Number:
Japanese Patent JPS54178521
Kind Code:
U
Application Number:
JP7749078U
Publication Date:
December 17, 1979
Filing Date:
June 06, 1978
Export Citation:
International Classes:
H04R9/00; H04R1/22; H04R7/18; H04R7/20; H04R9/06; (IPC1-7): H04R9/00; H04R1/22; H04R7/20
Domestic Patent References:
| JPS50113219A | 1975-09-05 | |||
| JPS54157618A | 1979-12-12 |