Need graph coloring code

[dewar@gnat.com]

<<> Um ... I don't read the statutes and case law that way.  In fact, I read it
> exactly the opposite way:  substantial improvements of the original algorithm
> are specifically covered by the original patent.
>>

You can only patent inventions, not ideas, so the idea that a patent
covers all future inventions based on the same or similar ideas seems
dubious to me. What case law are you referring to here?