Appologies to Cohunt. I didn't catch your post. The best info I can come up with these traps by personal contact with Bill, and bringing his obituary up on Google is, WILLIAM JOHN CONLEY was born Dec 5/1928 in Florida and with his family came to Canada in the very early 40's.At this time gold was booming in the area of Bissett Manitoba. They built a log homestead on Wallace Lake, 12 miles from there. His family trapped the area. Bill attended at University of Manitoba and became quite involved with the biology and wildlife station they had called Taiga Biological station .At this time the big push was to develope a quick kill body trap and thus Bill with help developed this trap. Approximately ten were made and some years later when I bought his much more functional conibears I also bought all of these (my weak moment) but they were so unique. Gold was always Bill's interest right up until he died April 19,2000. These traps are definitely different, with the pull rather than push trigger that is baited. A lot of though went into the design, but the fact they weigh 15 pounds each leaves a little to be desired. They are also fun to set as they have no safeties and when I've done it both hands and knees are involved. I have sold one on this thread and have three left. They are the last and only as I don't ever see someone copying them. I checked for patents and couldn't find any registered in Canada.