Many pilots were annoyed by the demand for patent royalties being made for such basic things as drawing a line on an electronic chart. A bill to combat patent trolls, H.R. 3309, is currently being considered by the House of Representatives:
http://www.gop.gov/bill/113/1/hr3309
Text of the bill:
http://docs.house.gov/billsthisweek/20131202/CPRT-113-HPRT-RU00-HR3309.pdf
http://www.gop.gov/bill/113/1/hr3309
Text of the bill:
http://docs.house.gov/billsthisweek/20131202/CPRT-113-HPRT-RU00-HR3309.pdf