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According to the 2nd edition of PHP, the first such US patent (for  'puzzle 
records') was issued to Edgar Berliner (Emile's son) in  1908-1909.
 
  Since the first Berliner Puzzle Plate occurred in England in 1898,  there 
may well have been an earlier patent (there). It is possible, I suppose,  
that the interleaving concept was not "novel" enough to pass muster with the 
US  Examiners.
 
Allen
 _www.phonobooks.com_ (http://www.phonobooks.com) 
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In a message dated 8/7/2013 2:32:01 A.M. Eastern Daylight Time,  
[log in to unmask] writes:

I  haven't found the patent yet,