Hearing Aids By kaemaj Nov 20, 1898 1st Hearing Aid Invented Invention Period: Nov 20, 1990 to Nov 20, 2012 1900 - Present Jan 6, 1995 Behind the Ear BTE Nov 9, 2007 Types 2007 Aug 4, 2010 Hearing Aids Across the Years Wiki Dec 30, 2012 Sound Bite 2012
