Pronghorn Technologies holds a valuable patent $($No$.782)$ for Dance$-$o$-$matic, an electronic system that provides individualized, interactive dance instruction that also provides real$-$time feedback. Pronghorn does not manufacture or sell the products and processes it develops. Instead, it conducts research and develops products and processes which it patents, and then assigns the patents to manufacturers on a royalty basis. Occasionally it sells a patent. The history of Pronghorn's patent number $782$ is as follows:

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