Patten On-Highway Parts From Air Conditioning to Undercarriage, New, Used or Rebuilt, Patten Industries has the parts you need to get the job done. Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, reuse and multiple lives. New CAT Parts Ordering New CAT Parts is quick and easy.  Visit this page to view the various ways to order New CAT parts and pick the way that is best for you and your Company. View New CAT Parts Used CAT Parts GreatLakes Equipment Co. is a division of Patten Industries, Inc. that provides CAT used and rebuilt parts and components globally.  Search our current used parts inventory.  View Used CAT Parts Non-CAT Parts GreatLakes Equipment is a division of Patten Industries, Inc. that provides new parts for other OEM equipment such as John Deere, Komatsu, Terex and Case. View Non-CAT Parts