“Tiny Megaphones:” Leonard Invisible Antiseptic Eardrums
In the 1900s, A.O. Leonard of New York City engaged in a mail-order business selling his “Invisible Antiseptic Ear Drums,” which he claimed could cure deafness. Artificial eardrums were quite popular...
View ArticleWilson’s Common Sense Ear Drums
George H. Wilson (1866-1949) of Louisville, Kentucky, received a patent (U.S. #476,853) for his “rimless [and] self-ventilating” artificial eardrum in 1892. Often referred as “wireless phones for the...
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