Bought a lot of vise grip type pliers at auction to get a couple I wanted. Several had been used in welding and were worthless except for more welding. Another one was rusty and no name I could see so I threw it in with the bunch I was giving away. Don't know why I looked again, but I noticed some writing on the lever. So I cleaned it and found a patent No. 1,489,458. It is a Peterson Vise Grip, the second patent, April 8, 1924. I guess the early ones did not have the name Vise Grip?