SUID patent infringement

[Henry Spencer]

> there is a footnote stating that "the set-uid bit is patented
> by Dennis Ritchie."

This is correct.  However, as a regulated monopoly, the Bell System was
required to license its patents etc. on reasonable terms to others.  I
believe AT&T explicitly waived royalties on the setuid bit a few years ago.

Beware:  I am not a lawyer.  Consult an expert before doing anything rash.
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