BRYSON, Circuit Judge.
Lampi Corporation owns U.S. Patent No. 5,169,227 (the '227 patent), which is drawn to a miniature, self-supporting fluorescent light that can be plugged into a standard electrical outlet. Lampi brought a patent infringement suit against American Power Products, Inc., (APP) in the United States District Court for the Northern District of Illinois. After a bench trial, the district court found that APP had not infringed the asserted claims of...
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