AHT Changes Its Purpose
AHT becomes a holding company, transferring its distribution business to
AHT becomes a holding company, transferring its distribution business to
Edward B. Patterson Jr. named Chairman of AHT
AHT moves to a seven story building in historic Philadelphia
Edward B. Patterson Sr. was named Chairman of AHT
J. Edward Patterson is named Chairman of AHT
The resulting disruption of scientific glassware from World War I
AHT moves to West Washington Square at 230 South Seventh
First AHT catalog published
Arthur H. Thomas is formed at the Hotel Walton in