Evolution of wearable devices through patent drawings

Hearing aid patent from 1939

One of the most successful categories of electronic wearable devices is one that most people never think of - hearing aids. This patent was filed in 1939 and features a wearable bone-conduction hearing aid.

U.S. Patent number: 2249572

Filed: March 22, 1939

Publication date: July 15, 1941

Assignee: Dora Lieber, Lieber Patents Corp.

Image taken from U.S. Patent 2249572 - Digitized by Google

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By Teena Maddox

Teena Maddox is Associate Managing Editor at TechRepublic. She oversees TechRepublic's news team and TechRepublic Premium. She focuses on tech and business and how the two worlds intersect. Teena's lifelong journalism career has included writing on s...