File:Joke Buzzer Patent.png

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current22:06, 1 October 2009Thumbnail for version as of 22:06, 1 October 2009768 × 1,047 (173 KB)commons>GRuban{{Information |Description={{en|1=Diagram of the first joke buzzer, later w:joy buzzer, from United States patent application 1845735, by w:Soren Sorensen Adams.}} |Source=http://www.google.com/patents?id=AM9GAAAAEBAJ&pg=PA1 |Author=Soren Adam

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