Posted by Little Dave on Thursday, July 03, 2003 at 3:43PM :
In Reply to: Re: Speaking of Willock Swivel Frames... posted by Todd Wilson on Thursday, July 03, 2003 at 2:33PM :
Filed Jan 2, 1945
# 2,366,166
When searching you may need to type in 023366166. It is not very detailed, however there are a couple of similar patents that are much more informative