Of Toothbrushes and Mousetraps

by Larry Emmott on February 1, 2013

in Just for Fun

According to The Dental Tribune there were more than 150 patents issued last year (2012) for toothbrushes. There are more than 4,600 patents in total since the first one was issued in 1857. On the other hand there were only 8 patents issued last year for better mouse traps.

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