Document Type and Number:
Japanese Patent JPS4518224
Kind Code:
Y1
More Like This:
WO/2019/163047 | HEARING DEVICE USING BONE CONDUCTION |
Application Number:
JP1000668U
Publication Date:
July 24, 1970
Filing Date:
February 12, 1968
Export Citation:
International Classes:
(IPC1-7): H04R1/00