Intellectual property defined
https://www.investopedia.com/terms/i/...
How to register a copyright
https://www.copyright.gov/help/faq/fa...
Patents and trademarks
https://www.uspto.gov/trademarks-appl...
Link to Alphabet / GOOG SEC filing
https://www.sec.gov/ix?doc=/Archives/...
Facebook disclosure of Instagram acquisition (page 72)
https://www.sec.gov/Archives/edgar/da...
David Bowie's sale of his music recordings
https://money.cnn.com/2016/01/11/medi...