| Patents for Armstrong Bros. Tool Co. |
Patents 1 -
15
of 36
      |
| Number | Date | Patentee | Title | Type |
| 492,381 | Feb. 28, 1893 | G. Armstrong | Tool Holder | lathe tools |
| 613,950 | Nov. 08, 1898 | H.D. Williams, E.C. Lewis, H.G. Hoadley | Lever and Ratch Attachment | ratchet wrenches |
| 658,478 | Sep. 25, 1900 | H.G. Hoadley, H.D. Williams | Mechanical Movement | ratchet wrenches |
| 675,184 | May 28, 1901 | J. Armstrong | Tool Holder | metal planer tool holders |
| 700,865 | May 27, 1902 | J. Armstrong, S. Welter | Cutting Tool | |
| 707,472 | Aug. 19, 1902 | J. Armstrong, S. Welter | Tool Holder | metal planer tool holders |
| 725,019 | Apr. 14, 1903 | J. Armstrong | Tool Holder | lathe tool holders and tool posts |
| 745,758 | Dec. 01, 1903 | S. Welter, J. Armstrong | Slotting Machine Tool Holder | slotting machine tool holders |
| 779,516 | Jan. 10, 1905 | J. Armstrong | Process of Cuttting Self Hardening Steel | |
| 914,012 | Mar. 02, 1909 | P. Armstrong | Ratchet Drill | drill accessories |
| 960,769 | Jun. 07, 1910 | J. Armstrong | Nurling Tool | |
| 1,024,656 | Apr. 30, 1912 | I.W. Sprink | Boring Bar | |
| 1,066,899 | Jul. 08, 1913 | K. Gulbrandsen | Safety Lathe Dog | lathe dogs |
| 1,103,164 | Jul. 14, 1914 | H. Turner | Tool Holder | lathe tool holders and tool posts |
| 1,196,884 | Sep. 05, 1916 | R.B. Patterson, Jr. | Appliance for mounting and demounting split pulleys | industrial machine pulleys and belt drive mechanisms |
