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��� JFIF � � ��CExif MM * M z � �( 1 �2 �; ! ��i LThe discovery of warfarin unfolded in the 1930s when cattle in Wisconsin and elsewhere bled to death after grazing on moldy sweet clover hay. UW biochemist Karl Paul Link was able to isolate a chemical anticoagulant known as dicumarol. UW patented the research under the name warfarin in 1948, and marketed it not as medicine but as a commercial rat poison. Though its patents expired in the early 1980s, warfarin brought in $120 million in revenue, adjusted for inflation. It is still the most widely used blood thinner in the world. Warfarin research, Link and female assistant in 1949. � � Adobe Photoshop 7.0 2015:11:20 17:20:35 University Archives at UW-Madiso � �� � M� � �( � � H H ��� JFIF H H �� Adobe_CM �� Adobe d� �� � �� f �"