All patents related to IEEE standards are listed on the IEEE website:
Any companies that have essential patents for an IEEE standard are required to disclose them and give letters of assurances that they will license them to users under FRAND conditions. Samsung did do this.
In my opinion, the terms that Samsung offered were not "Reasonable" and were completely out of line compared to all other license fees associated with IEEE standards. Typically these fees are "one time fees per company, often less than $1000.00 USD". I feel that this causes a "chilling effect" with all existing IEEE standards until IEEE defines what exactly "Reasonable" means. (disclaimer: I am technical editor for two IEEE standards)
Of course that in itself can be a huge problem for GPL and any open source implementations - for instance see the patents that Samsung has on Precision Time Protocol ( http://standards.ieee.org/about/sasb/patcom/loa-1588-samsung-12apr2007.pdf ) which were blocking RedHat from releasing ptpd: https://bugzilla.redhat.com/show_bug.cgi?id=556611 - It looks like in this ptpd case, Samsung was reasonable and allows people to do time stamping of packets for free as in GPL.
Regardless of my opinions, ITC said the fees to Apple were reasonable. I guess here the government steps in and says that the fees still stand but the ruling can't block the shipment of devices.