A patent licence dispute arose concerning whether certain orthodontic brackets sold by the defendant were covered by a U.S. patent licensed to the defendant under a royalty agreement.
The plaintiff alleged the products fell within several patent claims and sought unpaid royalties and aggravated damages.
The court conducted a claim construction analysis under U.S. patent law principles and compared the patent claims with the accused products.
It held that although some claim elements were present, the products did not include the required "slidable locking shutter" operating through a sliding motion between open and closed positions.
Because a required claim element was absent, the products did not infringe the patent and were not covered by the licence agreement.