Vanderman Manufacturing Co.
Appears to have been founded in 1878 by William Vanderman in Willimantic, CT. Here's a brief historic review on the Nesci Enterprises Website. They predominately produced strong boxes and pipe / steamfitter vises.
This article from the June, 1908 edition of Engineering Review notes that the company was first organized as the Vanderman Plumbing & Heating Co. and reorganized as the Vanderman Manufacturing Co. in 1892.
Here are the results of a Google search on William Vanderman patents.
Here's an example of a #1 Pipe Vise courtesy of Skip and posted here on Tool Talk.