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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Teena Maddox is a Senior Editor at TechRepublic. She's an award-winning journalist and specializes in business and lifestyle features. She has also worked at People magazine, W magazine and Women's Wear Daily.