MEMORANDUM OPINION
ELLIS, District Judge.
In this patent infringement action, plaintiff Semiconductor Energy Laboratory Co. ("SEL") alleges that defendants Samsung Electronics, Samsung Electronics America, and Samsung Semiconductor, (collectively "Samsung") made or sold active matrix display units that infringe SEL's U.S. Patent No. 5,543,636 ("the '636 patent"). Among its defenses to SEL's charge of infringement, Samsung alleges that the '636 patent is...
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