A few U.S. patents had some type of "sliding intermediate jaw" The earliest in the DATAMP category of "pipe & nut combination wrenches" is patent no. 474,987 (not known to have been produced). S. M. Friede patent no. 525,684 is the STAR combination nut & pipe wrench with screw adjustable intermediate jaw having flat face on one side, and slanted face with pipe gripping teeth on the other. The nearest to the slim sliding intermediate jaw in STEINADLER (S#767) is J. E. Wakefield patent no. 886,448 which is a screw adjusted "auto monkey wrench" type with sliding intermediate jaw (most are missing that intermediate jaw as it ate up working space) Some of the Wakefield patent wrenches are also marked "FAIRBANKS GAS & GASOLENE ENGINES." (S#559).