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.
Parker & Sons Air Conditioning was founded by Jack and Faye Parker in 1974 in Phoenix, Arizona. Back then trust wasnât just a word, it was a contract. After over 40 years, Parker & Sons has evolved into one of Arizonaâs oldest and largest service companies with more than 100 team members. Our services have expanded to include not only heating and cooling, but plumbing, electrical, drain cleaning, reverse osmosis, water softeners, misting systems, and indoor air quality as well.