hello all , this site was posted over on redpower ,have look thougth the patents that caterpillar have loged ,some stange machine in there ,bruce oz

www.google.com/patents?vid=USPAT4171023&...=caterpillar+tractor

patent search for caterpillar tractor
www.google.com/patents?lr=&q=caterpillar+tractor&sa=N&start=50

For a search of U.S. patents, go to www.uspto.gov/patft/

Unfortunately, when searching for a location for British patents, I could find none on-line. Maybe someone can offer a clue as to their availability.

I have done a lot of research into U.S. patents on different subjects over the years. It used to be that you had to find a Patent Depository Library, and then look up on microfilm. Having them available on-line is terrific.

Happy searching!

GWH