Harvard Apparatus is a major US manufacturer of specialized physiological research laboratory equipment with current headquarters in Holliston, Massachusetts.

Frustrated by the lack of high quality and cost-effective equipment then available, Porter began manufacturing physiology teaching equipment in a machine shop that he created on the medical school campus.

Charles W. Eliot, the president of Harvard University, although supportive of Porter's work and mission, was concerned that Porter's enterprise would be viewed as a commercial venture operating on nontaxed property.

[5] Harvard Apparatus also developed first volume controlled- and then pressure controlled ventilators, pulsatile blood pumps, transducers, amplifiers, recorders, glassware and many other specialized bioscience research products.

Harvard Bioscience (Nasdaq: HBIO) is a global developer, manufacturer and marketer of scientific instruments.