In this dispute over the inventorship of a patent that is integral to BlackBerry products, the district court held a bench trial on the applicability of laches. The issue at the bench trial turned on whether RIM suffered economic prejudice as a result of plaintiff’s delay in bringing the lawsuit.
The complaint to correct the inventorship of the patent-in-suit was filed on August 1, 2011. After a summary judgment motion disposed of the state law claims, the district court found that RIM had established a presumption of laches on the correction-of-inventorship claim but the plaintiff had rebutted the presumption by showing a lack of evidentiary or economic prejudice that resulted from the unreasonable delay in bringing the lawsuit. The district court then ordered a bench trial to resolve the disputed issues of fact as laches is an equitable defense that is heard by the court and not a jury. After the bench trial, the district court made various findings of fact.
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