| Patents for P. P. Burtis |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 156,066 | Oct. 20, 1874 | E. Schlenker | Improvement in vises | bench vises |
| 162,194 | Apr. 20, 1875 | E. Schlenker | Improvement in bolt-threading machines | metal threading machines |
| 166,730 | Aug. 17, 1875 | E. Schlenker | Improvement in hoisting-machines or elevators | elevators and lifts |
| 168,135 | Sep. 28, 1875 | O.C. Burdict | Machine For Forging Wrench-Bar Heads | wrench jaw components |
| 182,230 | Sep. 12, 1876 | E. Schlenker | Improvement in paper-cutting machines | paper cutting machines |
