| Patents for Alex. F. Roberts |
Patents 1 -
15
of 24
      |
| Number | Date | Patentee | Title | Type |
| 59,241 | Oct. 30, 1866 | K. Loffler | Improved cork-pull | non worm cork extractors |
| 62,849 | Mar. 12, 1867 | T. Hofstatter | Improvement in Augers | countersinks |
| 64,391 | Apr. 30, 1867 | H. Whiting | Improvement in Dividers | compasses |
| 66,174 | Jun. 25, 1867 | E.H. Roe | Hand Saw | backsaws |
| 66,177 | Jun. 25, 1867 | J.V. Secor | Wrench | nut wrenches |
| 67,818 | Aug. 13, 1867 | G.C. Taft | Improvement in Wrenches | screw adjust wrenches |
| 70,005 | Oct. 22, 1867 | B.S. Lawson | Improvement in Wrenches | wrench jaw components |
| 70,923 | Nov. 12, 1867 | T.D. Vorhees | Improvement in Screw-Drivers | screwdriver mechanisms |
| 73,290 | Jan. 14, 1868 | F. Bowly | Improvement in instruments for drawing ellipses | special purpose gauges |
| 78,299 | May 26, 1868 | N.F. Loi | Improvement in Pipe-Wrenches | pipe tongs |
| 79,027 | Jun. 16, 1868 | A. Thayer | Clinchers | combination tools |
| 79,642 | Jul. 07, 1868 | J.M. Evarts | Improvement in Pipe-Tongs | pipe tongs |
| 89,690 | May 04, 1869 | F.C. Richer | Improved Monkey-Wrench | nut wrenches |
| 93,212 | Aug. 03, 1869 | H. Reiss, A.J. Lutz | Milling Tool | milling machine cutters |
| 100,089 | Feb. 22, 1870 | G. Walker | Improvement in Saw-Grinding Machine | tool making machines |
