Cudworth-Hooper began in the 1920s as a supplier of farming equipment, and as their success with hog oilers grew, so did their inventory. Today there are over 36 divisions of Cudworth-Hooper, making them one of the largest manufacturers in the world. Their catalogues have grown larger every year - since they have never discontinued an item, only adding to their product list - so a complete catalog today numbers nearly as many volumes as the Complete Oxford English Dictionary.