Mr. Thomas passed away in 1942 at the age of 70. He worked at his office almost up to that time. Upon his death, under his and Patterson’s original pact, the management of Arthur H. Thomas Company passed to the Patterson family. Edward Patterson managed the business until his death in 1955 at the age of 82, and was succeeded by his son Edward B. Patterson.
In the early 1980’s AHT changed its name formally to Thomas Scientific, reflecting its then biggest entity. In 1983, AHT began a series of acquisitions starting with the water analysis solutions leader LaMotte Chemical Products Company in Chestertown, Maryland, and later AHT acquired Cannon Instruments of State College, Pennsylvania.
The fourth generation of Pattersons continue to be involved in the company, with the company’s current Chairman Rob Patterson. At one time AHT had been in a 7-story headquarters at 3rd & Vine Streets in historic Philadelphia, on property once owned by the father of the iconic flag maker Betsy Ross. AHT has since relocated to more modern offices and is now situated in affluent, suburban Chadds Ford, PA.
AHT is determined to stay true to its resonant beginnings and mission as a company, even as it searches for new and revolutionary technologies and equipment to acquire and provide the highest quality engineered products and solutions to its customers. This has been an AHT hallmark since 1900, and current management is determined to keep this so.