During 2016, Bridgeport Corporation spent $148,320 in research and development costs. As a result, a new product called the New Age Piano was patented. The patent was obtained on October 1, 2016, and had a legal life of 20 years and a useful life of 10 years. Legal costs of $23,760 related to the patent were incurred as of October 1, 2016.

1. Prepare all journal entries required in 2016 and 2017 as a result of the transactions above. (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.)

2. On June 1, 2018, Bridgeport spent $10,440 to successfully prosecute a patent infringement suit. As a result, the estimate of useful life was extended to 12 years from June 1, 2018. Prepare all journal entries required in 2018 and 2019. (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.)

Date	Account Titles and Explanation	Debit	Credit
2018	enter an account title to record patents	enter a debit amount	enter a credit amount
	enter an account title to record patents	enter a debit amount	enter a credit amount
	(To record patents)
2018	enter an account title to record amortization expense	enter a debit amount	enter a credit amount
	enter an account title to record amortization expense	enter a debit amount	enter a credit amount
	(To record amortization expense)
2019	enter an account title	enter a debit amount	enter a credit amount
	enter an account title	enter a debit amount	enter a credit amount

3. In 2020, Bridgeport determined that a competitors product would make the New Age Piano obsolete and the patent worthless by December 31, 2021. Prepare all journal entries required in 2020 and 2021. (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
enter an account title	enter a debit amount	enter a credit amount
enter an account title	enter a debit amount	enter a credit amount