Document Type and Number:
Japanese Patent JPS4939308
Kind Code:
Y1
Application Number:
JP3527870U
Publication Date:
October 29, 1974
Filing Date:
April 10, 1970
Export Citation:
International Classes:
H04R17/00; G01S7/52; G01S7/521; H04R17/10; (IPC1-7): H04R17/10; G01S7/52