The company was inc'd in Chicago in 1919. Neither the principals listed nor the director, nor the company itself show up in the patent files. The company seems to vanish after 1920.
The half dozen similar ones I found around the net all say Pat Pending, given the similarity to the earlier patented Mossberg wrench that it looks like, I can't help wondering if they didn't get the patent.....
Given the reasonably nice plating, it *may* be worth that price...