Stephens Patent Vise Co.
The Trow City's Directory in 1879 announces the incorporation of the Stephens Patent Vise Co. President: Nathan Stephens, SEC: Benjamin F. Stephens - $10,000 capital
Despite the above announcement, we find the company listed in the Centenial International Exhibition in 1876.
I do find references to a patent for a vise in 1842, and an improvement in 1845. I've yet to find those patents.