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.
Carrier Corporation was acquired by United Technologies Corporation (UTC) in July 1979. Prior to the acquisition by UTC, Carrier Corporation was known as the Carrier Air Conditioning Company.International Comfort Products (ICP), headquartered in Lewisburg, Tennessee, was acquired by Carrier in 1999.he corporation bearing his name succeeded in marketing its air conditioner to the residential market in the 1950s, which led to formerly sparsely populated areas such as the American Southwest becoming home to sprawling suburbs. Carrier is the largest air conditioning producer in the world.