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   Worst patents of all time?

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There's a short article at http://www.sciam.com/2002/0202issue/0202patents.html
on some of the worst patents of all time.  My favorites are

- 3 dimensional pie charts
  (U.S.: 5,491,779: "Three-Dimensional Presentation of 
  Multiple Data Sets in Unitary Format 
  with Pie Charts"; Richard D. Bezjian.)

- training manuals
  (U.S.: 5,851,117: "Building Block Training Systems 
  and Training Methods"; Keith A. Alsheimer and others.)


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