Data retrieved from USPTO (via Assignments on the Web > Patent Query, using Search Criteria: Assignee Name = INTELLECTUAL VENTURES) on 7th Dec. 2011. A total of 2324 patents and published applications found and listed, including 2042 granted patents of which 1169 published when granted (meaning filed before 29th Nov. 2000) and 873 granted after the 18-month publication stage and still 282 applications pending after their publication.
(the numbers are listed in an excel file named iv_patents_and_published_applications.xls, see below)