On June 16, 1891 Ernest Mercadier patented in-ear headphones (ear buds) incredible in the miniaturization in this epoch. Adapted for insertion into the ear—with a rubber cover to lessen the friction against the orifice of the ear. The antecedent to all! https://patents.google.com/patent/US454138 pic.twitter.com/KNU2qqIy9u
8:09 AM - 18 Apr 2019
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