A message from the IEEE Xplore team:
“… Effective 19 June 2013, Forward Patent Citations (or “Cited By Patents”) will now be available to IEEE Xplore subscribers.
The “cited by” tab on the IEEE Xplore article abstract page now includes U.S. and European patents that cite that particular article. You will also be able to view the full text of the patent via links to the USPTO website.
In addition, the search results page now shows a patent citation number for items that have been cited in patents. In addition you can sort your search results by the most cited in patents.”