In 1939 Clary began as a high-tech manufacturer of aircraft parts for the military and evolved into manufacturing unique technology including gyroscopic devices for military missile programs, portable computer products and mechanical adding machines.

In the 1970s Clary designed the first all-solid-state Uninterruptible Power Supply (UPS) and ever since has been innovating this technology to meet the expanding needs of customers the world over. Clary all-digital UPS systems are known worldwide for their extreme temperature capability and rugged reliable design – keeping systems running while protecting sensitive instrumentation and electronics from every power anomaly imaginable.