 Mercer Rubber Company operated from a site at 136 Mercer Street in Hamilton Square, an area within Hamilton Township, New Jersey, from 1866 until 1993.The company was purchased from the Sayen family by someone identified in New Jersey government reports only as "Mr. Brennan" in 1977, and from "Mr. Brennan" by Mason Industries in 1983.In January 1993, company operations were relocated to Hauppauge, Suffolk County, New York.