The story
Howard Hart and Norman Cooley established the Hart & Cooley Manufacturing Company in New Britain, Connecticut in 1901. This new company became the first in the nation to manufacture warm-air registers from stamped steel. In the 1920s Hart & Cooley, Inc. made the move to Holland, Michigan, which would be the company's headquarters for almost 90 years.
During World War II, it became commonplace for many American companies to assist in production to help national efforts overseas. Hart & Cooley, Inc. ceased production of HVAC material in favor of electrical shipboard boxes and mortar shells. Production returned to normal by the end of the war.
In the second half of the century, Hart & Cooley expanded into many other products lines, including Type-B vent for gas-fired appliances, all-fuel chimney systems and flexible air ducting. Hart & Cooley Inc. celebrated its centennial anniversary in June 2001, and 6 years later moved its headquarters to Grand Rapids, MI, 30 miles northeast of Holland.
From Wikipedia’s article on Hart & Cooley, shared under CC BY-SA 4.0.5