Rumble Means Lawsuits If You're Sony.

Two years later engineer Craig Thorner wants in on the legal action. As Joystiq explain:
After its settlement with Sony, Immersion was set to take on Performance Designed Products (PDP) for similar rumble-yoinking reasons. PDP contacted Thorner for some pre-litigious preparation. They negotiated terms for the licensing of his patents — though Thorner used the same lawyers who represented Sony to help with said negotiation. His complaint is that these lawyers got him unfavorable results in the negotiation, including low royalty payments, and the inclusion of a provision that would grant a patent license to Sony.</blockquote>

We hate law.