Under the patent exhaustion doctrine, when a patent owner sells one of its products, she can no longer control that item through the patent laws and the purchaser and all subsequent owners are free to use or resell the product just like any other item of personal property.

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The patent exhaustion doctrine, also known as the first sale doctrine, holds that once a patented item is sold by the patent holder (or with their consent), the patent rights are exhausted for that item, allowing the purchaser to use or resell the item without further restriction under patent law.

Under the Patent Exhaustion Doctrine, When a Patent Owner Sells