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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. Yellen invented it on the basis of his experience of using a Ford motor tyre lever.<ref name="geni">{{REFweb
|url=https://www.geni.com/people/Hiram-Yellen-MD/6000000057824545100
|title=Dr. Hiram S. Yellen, MD
{{PUB}}
* {{GoldsteinYellen1935}}
{{SEEALSO}}* [[United States of America]]
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* {{REFweb
[[Category:Jewish]]
[[Category:Promoter]]
[[Category:Author]]
[[Category:USA]]