RT Journal Article SR Electronic T1 Patents, profit and the public good: the case of a 19th-century artificial limb manufacturer JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 824 OP 825 DO 10.1503/cmaj.150871 VO 188 IS 11 A1 Lieffers, Caroline YR 2016 UL http://www.cmaj.ca/content/188/11/824.abstract