Brief Exercise 12-1 Pronghorn Corporation purchases a patent from Crane Company on January 1, 2017, for $50,000. The patent has a remaining legal life of 15 years. Pronghorn feels the patent will be useful for 10 years. Prepare Pronghorn's journal entries to record the purchase of the patent and 2017 amortization. (Credit account titles are automatically indented when amount is entered. Do not indent manually. If no entry is required, select "No Entry for the account titles and enter 0 for the amounts.) Account Titles and Explanation Debit Credit (To record purchase of patents) (To record amortization of patents)