description Helen Murray Free Overview
Helen Murray Free was an American chemist whose work transformed routine clinical testing, particularly tests used to detect and monitor diabetes. Working with her husband, Alfred Free, at Miles Laboratories, she helped develop dry reagent strips that changed color when exposed to substances in urine. Their products included Clinistix, introduced in the 1950s for glucose testing, and later multiple-test strips that made chemical screening faster and more accessible.
insights Ranking position
Helen Murray Free ranks #444 of 507 in the Inventor ranking, behind Harry Coover, ahead of Ferdinand von Zeppelin.
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