| Patents for Armstrong Bros. Tool Co. |
Patents 1 -
10
of 36
      |
| Picture | Number | Date | Patentee | Title |
 | 492,381 | Feb. 28, 1893 | G. Armstrong | Tool Holder |
 | 613,950 | Nov. 08, 1898 | E.C. Lewis, H.G. Hoadley, H.D. Williams | Lever and Ratch Attachment |
 | 658,478 | Sep. 25, 1900 | H.D. Williams, H.G. Hoadley | Mechanical Movement |
| | 675,184 | May 28, 1901 | J. Armstrong | Tool Holder |
| | 700,865 | May 27, 1902 | J. Armstrong, S. Welter | Cutting Tool |
| | 707,472 | Aug. 19, 1902 | J. Armstrong, S. Welter | Tool Holder |
| | 725,019 | Apr. 14, 1903 | J. Armstrong | Tool Holder |
| | 745,758 | Dec. 01, 1903 | S. Welter, J. Armstrong | Slotting Machine Tool Holder |
| | 779,516 | Jan. 10, 1905 | J. Armstrong | Process of Cuttting Self Hardening Steel |
 | 914,012 | Mar. 02, 1909 | P. Armstrong | Ratchet Drill |
