| Patents for Walter Allen |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 132,804 | Nov. 05, 1872 | O.A. Haynes, E. Cliff | Improvement in Lathe Dogs | lathe dogs |
| 141,828 | Aug. 12, 1873 | A.M. Strattan | Crozing and Chamfering Plane | crozes |
| 148,716 | Mar. 17, 1874 | W. Kuck | Improvement in Metal-Drilling Machines | drilling and boring |
| 203,822 | May 21, 1878 | D. Fisher | Pipe-Wrench | wrench jaw components |
| 212,795 | Mar. 04, 1879 | D. Fisher | Pipe and Nut Wrench | wrench jaw components |
| RE8,867 | Aug. 19, 1879 | P.H. Kells | Improvement in brick-machines | brick and tile making machines |
| 231,557 | Aug. 24, 1880 | W.H. Glover | Monkey Wrench | quick adjust wrenches |
| 278,911 | Jun. 05, 1883 | A.H. Emery | Dynamometer | testing machines |
| 278,912 | Jun. 05, 1883 | A.H. Emery | Dynamometer | testing machines |
| 278,913 | Jun. 05, 1883 | A.H. Emery | Weighing-machine and dynamometer | testing machines |
| 278,914 | Jun. 05, 1883 | A.H. Emery | Machinery for testing the strength of metal | testing machines |
| 278,915 | Jun. 05, 1883 | A.H. Emery | Tensile and compressive strength tester | testing machines |
| 278,916 | Jun. 05, 1883 | A.H. Emery | Tensile strength tester | testing machines |
| 278,917 | Jun. 05, 1883 | A.H. Emery | Machine for testing the strength of materials | testing machines |
| 278,918 | Jun. 05, 1883 | A.H. Emery | Machinery for testing the strength of metal | testing machines |
