| Patents for Frank H. Allen |
Patents 16 -
27
of 27
      |
| Number | Date | Patentee | Title | Type |
| 422,479 | Mar. 04, 1890 | L.E. Whiton | Improved scroll chuck for metal lathes | metal lathe chucks |
| 422,480 | Mar. 04, 1890 | L.E. Whiton | Chuck | metal lathe chucks |
| 424,565 | Apr. 01, 1890 | P. Miller | Auger | portable timber mortisers |
| 425,279 | Apr. 08, 1890 | L.E. Whiton | Scroll chuck jaws for metal lathes | metal lathe chucks |
| 425,572 | Apr. 15, 1890 | D.D. Tompkins | Self-oiling pulley | industrial machine pulleys and belt drive mechanisms |
| 432,585 | Jul. 22, 1890 | E.F. Valiquet | Screw Cutting Lathe | engine lathes |
| 511,429 | Dec. 26, 1893 | A.S. Hubbell | Bench Vise | bench vises |
| 532,127 | Jan. 08, 1895 | L.E. Whiton | Gear-cutting machine | gear making machines |
| 640,194 | Jan. 02, 1900 | G.L. Griswold | Bevel | bevels |
| 640,452 | Jan. 02, 1900 | D.B. Date | Staple Puller | hammers |
| 670,263 | Mar. 19, 1901 | L.E. Whiton | Scroll-chuck | metal lathe chucks |
| 719,088 | Jan. 27, 1903 | G.P. Coates | Pocket Implement | combination tools |
