yum

[Tim Daly]

>> > 
>> > I'm pretty sure there's prior art.
>> 
>> The oldest date seems to be 1994.  I'd bet money somebody on this list
>> can come up with some prior art.  :-)
>
>Well, I haven't done a heck of a lot of research, but from reading the
>abstract, I suspect CMU's SUP protocol would invalidate the patent. We
>were using it while I was there as an undergrad.
>
>Steven Shafer and Mary Thompson, The SUP Software Upgrade Protocol
>http://www.cs.cmu.edu/afs/cs.cmu.edu/project/mach/public/sup/sup.ps
>8 September 1989

The patent mentions SUP.

Tim