RHEL is mentioned in this attack on Google's use of the Linux kernel in
back-end servers.
<http://www.theregister.co.uk/2011/04/21/texas_jury_says_google_infringed_linux_patent/>
> At least some of those sued were using Red Hat Enterprise Linux (RHEL) on
> the back-end. Google apparently uses its own version of Linux across its
> famously distributed infrastructure.
> Bedrock has also asked for an injunction preventing Google from
> infringing on its patent, but the court has yet to rule on this. Red Hat
> has also intervened in the case, asking the Bedrock patent be ruled
> invalid.
<http://fosspatents.blogspot.com/2011/04/texas-jury-finds-against-google-in.html>