Patent on UNIX set-UID

[Doug Gwyn]

In article <1144 at msa3b.UUCP> kevin at msa3b.UUCP (Kevin P. Kleinfelter) writes:
>I frequently read that UNIX's set-UID bit was one of the first software
>patents.

Not exactly; a hardware implementation was described since it wasn't
clear that a software invention would be patentable.

>Are they violating the patent?

Nobody is violating the patent rights, because the patent was dedicated
to the public many years ago.