Heres a tool made by BellHart Tool Co of Palmyra,Il Found a tool by BellHart that was a tendon cutter for hogs noses. It was patent 253359 of 1882 but is not this tool. Assume this tool to be some related concept but haven't been able to confirm. If someone has a copy of Onie Sims Hog control book it may list this tool.I have tried to find a copy of this book but it is out of print.