Tecumseh Products Company is a manufacturer of hermetic compressors for air conditioning and refrigeration products. Tecumseh Products Company has subsidiaries that sell externally and internally to Tecumseh. The Tecumseh corporate offices are located in Ann Arbor, Michigan. Tecumseh Products Company was founded by tool and die maker Raymond Herrick, in 1934. Raymond Herrick applied mass production concepts he had learned from automobile manufacturer Henry Ford to the production of refrigeration compressors. Following the outbreak of World War II, Tecumseh Products Company was called upon, like many American businesses, to aid in the war effort. This resulted in Tecumseh Products Company using its facilities to manufacture artillery shells for allied forces. Following the end of World War II, Tecumseh Products Company continued its production of refrigeration compressors and expanded into manufacturing compressors for air conditioning units.