некая контора IP Innovation LLC подала иск против Red Hat и Novell..
"Plaintiffs IP Innovation and Technology Licensing Corp. claim to have the rights to U.S. Patent No. 5,072,412 for a User Interface with Multiple Workspaces for Sharing Display System Objects issued Dec. 10, 1991 along with two other similar patents."
>>> ссылка на текст
>>> Подробности