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.
About Carrier Corporation. Carrier shouldered the load of keeping things hot and cold. The company was the world's largest maker of heating, air-conditioning, and refrigeration systems for residential, commercial, industrial, and transportation needs.Through Carrier Transicold, it made truck/trailer and container refrigeration equipment and provides transport air-conditioning â more...arrier also provided aftermarket services and components for its products. The company was a subsidiary of diversified manufacturer United Technologies Corporation (UTC); it accounted for about 20% of UTC's sales.