Monsanto Canada Inc v Schmeiser [2004] 1 S.C.R. 902, 2004 SCC 34 is a leading Supreme Court of Canada case on patent rights for biotechnology, between a Canadian canola farmer, Percy Schmeiser, and the agricultural biotechnology company Monsanto. The court heard the question of whether Schmeiser's intentionally growing genetically modified plants constituted "use" of Monsanto's patented genetically modified plant cells. By a 5-4 majority, the court ruled that it did. The case drew worldwide attention and is widely misunderstood to concern what happens when farmers' fields are accidentally contaminated with patented seed. However by the time the case went to trial, all claims had been dropped that related to patented seed in the field that was contaminated in 1997; the court only considered