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He invented the '''''Yellen Clamp''''', used in [[circumcision]].
In 1934, [[Aaron Goldstein]] and [[Hiram S. Yellen]] invented and mass marketed the [[Gomco]] clamp which makes it easier for doctors to cut off even more [[skin ]] than in traditional [[circumcision]]s. He invented it on the basis of his experience of using a Ford motor tyre lever.<ref name="geni"/>
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