| 3. | 
      
         
      
      -     
          4,558,302 -- December 10, 1985  
      
 -  The patent for LZW compression, used in GIF images.
      
   URL: http://164.195.100.11/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=/netahtml/search-adv.htm&r=1&f=G&l=50&d=PALL&p=1&S1=4558302.WKU.&OS=PN/4558302&RS=PN/4558302
      
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