Looking through the list I wonder how many of these patents have been contested and/or how many of these patent applications should be rejected. For instance, under the "Web Browser Federated Sign-On Protocol" Microsoft lists patent applications 2005-0223217-A1 and 2006-0112422-A1. There exists prior art for 2005-0223217-A1 claim 14 and further in A-Select
and I think for the rest of the claims in Shibboleth
. I would have to study 2006-0112422-A1 more in detail, but it looks like about half of the claims there also have prior art in those systems.