The explanation of the ECHL Protected Lists can be found in this link: http://echl.com/cgi-bin/mpublic.cgi?action=show_news2&cat=1&id=22237
Only a few Former Pats on the list (I think I got everyone):
Mitch McColm - Florida Everblades
Tim Kraus - Ontario Reign
Matt Robinson - Stockton Thunder
Lance Morrison - Victoria Salmon Kings
But there are tons of former WHLers protected. Just follow the link and you can check it out.