<P> On June 20 , 1854 , the United States Patent Office issued Patent No. 11,135 to O.H. Needham for a breast pump . Scientific American ( 1863 ) credits L.O. Colbin as the inventor and patent applicant of a breast pump . In 1921 - 23 , engineer and chess master Edward Lasker produced a mechanical breast pump that imitated an infant 's sucking action and was regarded by physicians as a marked improvement on existing hand - operated breast pumps , which failed to remove all the milk from the breast . The U.S. Patent Office issued U.S. Patent 1,644,257 for Lasker 's breast pump . In 1956 Einar Egnell published his groundbreaking work , `` Viewpoints on what happens mechanically in the female breast during various methods of milk collection '' . This article provided insight into the technical aspects of milk extraction from the breast . Many Egnell SMB breast pumps designed through this research are still in operation over 50 years after publication . </P>
<P> On June 20 , 1854 , the United States Patent Office issued Patent No. 11,135 to O.H. Needham for a breast pump . Scientific American ( 1863 ) credits L.O. Colbin as the inventor and patent applicant of a breast pump . In 1921 - 23 , engineer and chess master Edward Lasker produced a mechanical breast pump that imitated an infant 's sucking action and was regarded by physicians as a marked improvement on existing hand - operated breast pumps , which failed to remove all the milk from the breast . The U.S. Patent Office issued U.S. Patent 1,644,257 for Lasker 's breast pump . In 1956 Einar Egnell published his groundbreaking work , `` Viewpoints on what happens mechanically in the female breast during various methods of milk collection '' . This article provided insight into the technical aspects of milk extraction from the breast . Many Egnell SMB breast pumps designed through this research are still in operation over 50 years after publication . </P>
when was the first electric breast pump invented
when was the first electric breast pump invented
1921 - 23
1921 - 23