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::: I have added an image showing the transformation round. [[User:Danielap48|danielap48]] 02:04, 19 Oct 2006 (UTC)
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Here's an explanation of the US patent expiration for {{US patent|5214703}}. I acknowledge this constitutes [[WP:OR|original research]]; I offer it not as a source, but rather to explain why we should have confidence in the sources I mentioned above. I am a U.S. patent attorney, but why should you believe that?
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