Patent application 14252472 (US), filed 2014-04-14
Publication number: US20150296293A1
Title: MULTI-CHANNEL AUDIO SYSTEM HAVING A SHARED CURRENT SENSE ELEMENT FOR ESTIMATING INDIVIDUAL SPEAKER IMPEDANCES USING TEST SIGNALS
CPC codes: H04R   3/00
H04R   3/007
H04R  29/00
H04R  29/001
Office action: rejection, dated 2015-10-14
Rejection reasons: double_patenting
Final disposition: granted (2015-10-14)