| Patents for Alex. F. Roberts |
Patents 16 -
25
of 25
      |
| Number | Date | Patentee | Title | Type |
| 100,089 | Feb. 22, 1870 | G. Walker | Improvement in Saw-Grinding Machine | tool making machines |
| 108,330 | Oct. 18, 1870 | J.F. Cass | Improvements in Socket-Wrenches | wrench sockets |
| 119,654 | Oct. 03, 1871 | D. Sager | Corn Husker | corn huskers |
| 143,296 | Sep. 30, 1873 | M. Neckermann | Taper Turning Attachments to Lathes | metal lathe accessories and attachments |
| 148,889 | Mar. 24, 1874 | A. Kotzum | Pipe-Tongs | pipe tongs |
| 150,778 | May 12, 1874 | G. Norton | Improvement in Hatchets | axes |
| 153,254 | Jul. 21, 1874 | J.L. Hewes | Metal Planing Machines | metal planers |
| 181,693 | Aug. 29, 1876 | W.A. Lloyd | Improvement in Cant Hooks | lumberjack |
| 191,304 | May 29, 1877 | J.T. Bruen | Improvement in wire screws and nuts | spiral screwdrivers |
| 199,166 | Jan. 15, 1878 | C.G. Purdy | Improvement in Machines for Polishing Moldings | sanding machines |
