Liberty Moves To Invalidate Progressive Patents

Law360, New York (April 5, 2011, 7:24 PM EDT) -- Liberty Mutual Insurance Co. said Monday it had uncovered a prior art reference that would invalidate two patents asserted against it in Ohio by Progressive Casualty Insurance Co., though its request to stay the intellectual property and unfair competition suit was temporarily denied Tuesday.

In a motion filed Monday, Liberty Mutual and certain affiliates asked the U.S. District Court for the Northern District of Ohio to stay the litigation pending an ex parte re-examination of the two patents by the U.S. Patent and Trademark Office....
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