Mark Gordon wrote in message <39421BB5.AB8BA839@mailbag.com>...
>Digging out books...
>
>1984 - LZW compression invented and written up in IEEE Computer
>1985 - LZW patent approved
>1986 - Sperry (patent holder) merged with Burroughs to form Unisys, not
>quite a purchase like I remembered
>1987 - CompuServe creates GIF
>1993 - Unisys becomes aware that GIF uses LZW compression


Good news!  If the dates here are correct, the patent on LZW will expire in
two years.

Mark

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