These pliers feature the parallel action handle designed by W. B. Bernard shown in Patent No. 427,220. These cutting pliers were patented in Sept 25, 1894 and Nov 6, 1900. Patent 526480
The Schollhorn company was founded by William B. Bernard in 1870 in New Haven, Connecticut, the company was active until being sold to the Sargent Co. in 1948. According to the history at Alloy Artifacts, W.B. Bernard had many patents with the Schollhorn company and was variously listed as engineer and salesman, even the vice president.
Hi--Great little pliers--I cleaned up a flea-market pair this year. But FYI these are not parallel pliers, but based a different Bernard patent. Look up parallel pliers or parallel action pliers and you'll see the difference. The main one being the result that the jaws are parallel to each other no matter how far open or closes, not at an angle like the model you are showing.
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