| Patents for Alexander F. Roberts |
Patents 16 -
30
of 69
      |
| Number | Date | Patentee | Title | Type |
| 70,547 | Nov. 05, 1867 | J. Graham | Bevel & Try Square | bevels |
| 72,273 | Dec. 17, 1867 | D. Dick | Improvement in wood-turning lathes | spool or bobbin machines |
| 72,877 | Dec. 31, 1867 | W.H. May | Improved method of preparing wood for musical instruments | music instrument maker |
| 73,823 | Jan. 28, 1868 | J. Mays, E.W. Bliss | Improved die-press | stamping presses |
| 74,402 | Feb. 11, 1868 | C.B. Morse | Improvement in bobbins for spinning | |
| 75,413 | Mar. 10, 1868 | I. Hall | Improvement in machines for carving in wood | carving machines |
| 76,798 | Apr. 14, 1868 | C.B. Morse | Improvement in spinning-frame | |
| 77,439 | May 05, 1868 | S. Anderson | Improvement in saws | saw teeth |
| 77,596 | May 05, 1868 | D. Dick | Spool lathe | spool or bobbin machines |
| 78,157 | May 19, 1868 | I.C. Tate | Improvement in braces for bits | brace chucks |
| 78,726 | Jun. 09, 1868 | P.W. Dolan | Tailor's Rule | |
| 78,940 | Jun. 16, 1868 | W.M. Doty | Improved washing-machine | washing machines |
| 80,241 | Jul. 21, 1868 | L. Tilton | Improvement in wood-splitting machines | wood splitting machines |
| 81,182 | Aug. 18, 1868 | W.J. Linton | Tool Holder | tap wrenches and die stocks |
| 81,376 | Aug. 25, 1868 | L.A. Johnson | Improvement in guide for scrollsaws | scrollsaws |
