| Patents for Alex F. Roberts |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 59,844 | Nov. 20, 1866 | J. King, Jr. | Improvement in spring fish-hooks | |
| 61,902 | Feb. 05, 1867 | A.V. Westervelt | Improvement in Calipers | calipers |
| 67,937 | Aug. 20, 1867 | W.C. Abbe | Improvement in Pipe-Wrenches | pipe wrenches |
| 70,204 | Oct. 29, 1867 | N. Hablin | Improvements in Try- Squares | try squares |
| 77,082 | Apr. 21, 1868 | B. Assmann, J. Noepel | Improvement in saw Sets | saw sets |
| 78,341 | May 26, 1868 | A.J. Van Ornum | Lathe tool | wood lathe accessories |
| 83,347 | Oct. 20, 1868 | P.A. Whitney, A.W. Whitney | Machine for Bending and Folding Sheet Metal | sheet metal |
| 85,991 | Jan. 19, 1869 | R.A. Briggs | Improvements in combined rule and protractor | |
| 95,873 | Oct. 19, 1869 | W.M. Bleakley | Can Opener | can and jar openers |
| 98,216 | Dec. 28, 1869 | C.D. Allen | Steam Governor | steam engine governors |
| 106,371 | Aug. 16, 1870 | M.D. Kelly | Watchmakers Tool | watchmaker |
| 108,376 | Oct. 18, 1870 | J.M. Milhollin | Improvement in Weather-Board Gauges | clapboard markers |
| 118,997 | Sep. 12, 1871 | H. Wilson | Improvement in Pipe Wrenches | pipe wrenches |
| 139,710 | Jun. 10, 1873 | J. Edwards | Adjustaable Mouth for Match Planes | plane throat adjustments |
| 176,064 | Apr. 11, 1876 | C.W. Roberts | Screw Cutting Machine | pipe threading machines |
