3M
A1
Acme
American Gas Accumulators
Chapel Hill
Checker
Crouse-Hinds
Eagle
Econolite
General Electric
Indicator Controls Corp.
Laboratory For Electronics - Automatic
Harrington-Seaberg
Intelight
Master
Marbelite
McCain
Milwaukee
Optisoft
PEEK
Peterco
Plessey
Safetran
Sargent-Sowell
Singer
Southern Autoflow
Teeco Safety, Inc.
Traffic Control Technologies
Traffic Signals, Inc.
W.S. Darley
Wiley
WinkoMatic
