Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number US14/547,377 Inventor Friedrich Reining Claus Erdmann Furst Current Assignee (The listed assignees may be inaccurate. Google Patents US20150139428A1 - Apparatus with a speaker used as second microphone US20150139428A1 - Apparatus with a speaker used as second microphone
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