Gleason Corporation is a prominent machine tool builder based in Rochester, New York, USA. It has manufacturing plants in the USA, Britain, India, and Germany, and sales offices in those and additional countries. Gleasons importance lies in gear manufacturing—especially in building the machine tools that themselves make the gears. These gears and these machines are sold to industrial customers in a wide variety of fields, such as companies in the automotive and aerospace industries. The Gleason works, the machine shop that eventually evolved into the Gleason Corporation, was founded by Irish immigrant William Gleason in 1865 after his previous experience in other machine shops.