You must pass two qualifying exams in orthodontic assisting and infection control to become a Certified Orthodontic Assistant. As of April 2011, DANB certification for OAs was recognized in 38 states and required in four - Massachusetts, Maryland, New Jersey and Oregon.
American Standard Companies, Inc. was a global manufacturer of plumbing, heating, ventilating and air conditioning (HVAC) systems and services, bath and kitchen products and vehicle control systems.he company was formed in 1929 through the merger of the American Radiator Company and Standard Sanitary Manufacturing Company forming the American Radiator and Standard Sanitary Corporation. The group was renamed to the American Standard Corporation in 1967.
ARKLA: Division sold to Preway, Inc. Preway sold Servel gas air conditioning to the Dometic Corp. High efficiency furnace technology sold to Trane. Servel name now sold by Robur. ARMSTRONG:Founded by Lennox in 1928, became division of the Johnson Corp. in 1976.UXAIRE: Founded in 1939 by C. A. Olsen, purchased by Westinghouse in 1955, was purchased by York in 1981. MAGIC CHEF: In 1986, Magic Chef was acquired by the Maytag Co. Air conditioning division was sold to Lennox in 1988 and renamed Armstrong Air. See Johnson.