Document Type and Number:
Japanese Patent JPS5279075
Kind Code:
U
Application Number:
JP16673875U
Publication Date:
June 13, 1977
Filing Date:
December 09, 1975
Export Citation:
International Classes:
H04R17/00; B06B1/06; H01L41/04; H01L41/107; H04R17/02; (IPC1-7): H04R17/02; B06B1/06; H01L41/04
Domestic Patent References:
| JPS4939313U | 1974-04-06 |