sentences:  In 1995, Nellcor acquired Puritan Bennett and the newly expanded company was renamed Nellcor Puritan Bennett.In 1997, Nellcor Puritan Bennett became a part of Mallinckrodt, a medical products company with product lines in respiratory care, diagnostic imaging and analgesic pharmaceuticals.In 1998, Puritan-Bennett Aero Systems (PBASCO) was sold to BE Aerospace Inc.