Patent application 14251543 (US), filed 2014-04-11
Publication number: US20150296300A1
Title: FM FILTERING FOR CLASS-G/H HEADPHONES
CPC codes: H03F   1/0227
H04R   5/033
H03F   3/181
H03F   3/21
H03G   3/20
H04R   5/04
H04R2420/05
Office action: rejection, dated 2015-10-16
Rejection reasons: anticipation_102
Prior art cited: ref_id: 7162047
ref_type: patent
severity: novelty_destroying
Final disposition: granted (2015-10-16)