Caterpillar is a brand of industrial power engines that have a history which stretches back to 1925.
Cooper Origins - Cooper Machinery Services
Rotation sensation: Cooper Civil and Cat equipment
Caterpillar Company History Timeline
A timeline of Caterpillar Inc. through the years
Caterpillar Company History Timeline
The History of Caterpillar - Cooper Machinery Services
Caterpillar History - A Quick Overview of Cat® Equipment
The History of Caterpillar - Cooper Machinery Services
Caterpillar Company History Timeline