History
1913: Puritan Bennett entered the medical gas industry.
1940: Founder Ray Bennett invented a mechanical ventilator as an alternative to the iron lung machine.
1995: Nellcor acquired Puritan Bennett. The newly expanded company is renamed Nellcor Puritan Bennett.
1997: Nellcor Puritan Bennett became a part of Mallinckrodt, a medical products company with product lines in respiratory care, diagnostic imaging and analgesic pharmaceuticals.
1998: Puritan-Bennett Aero Systems (PBASCO) was sold to BE Aerospace Inc.
2000: Tyco International acquired Mallinckrodt to become a Tyco Healthcare company.
2007: Covidien spun off from Tyco International and inherited Puritan Bennett along with other Tyco Healthcare Brands.
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