Photo courtesy 123rf.com
On this day in 1880 the first patent for electrical hearing aids was issued. For more information click here. What did you learn today?
Showing posts with label hearing aids. Show all posts
Showing posts with label hearing aids. Show all posts
Friday, April 27, 2012
I Heard That!
Photo courtesy 123rf.com
On this day in 1880 the first patent for electrical hearing aids was issued. For more information click here. What did you learn today?
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