| Patents for Henry Howson |
Patents 31 -
45
of 45
      |
| Number | Date | Patentee | Title | Type |
| 397,701 | Feb. 12, 1889 | W.P. Dallett | Drilling-machine | drill presses |
| 410,487 | Sep. 03, 1889 | H. Broomell | Turbine Water Wheel | turbine water wheels |
| 430,082 | Jun. 10, 1890 | F.B. Miles | Drilling-machine | drill presses |
| 437,459 | Sep. 30, 1890 | F. Schoff | Portable reaming and tapping tool | portable metal drilling machines |
| 439,567 | Oct. 28, 1890 | F. Schoff | Corner Drill Press | drill presses |
| 440,423 | Nov. 11, 1890 | C. Disston | Plasterer's Trowel | plasterer |
| 441,509 | Nov. 25, 1890 | F. Schoff | Drill-support | portable metal drilling machines |
| 453,459 | Jun. 02, 1891 | J.G. Baker | Vise | bench vises |
| 468,519 | Feb. 09, 1892 | R.B. Haines, Jr. | Micrometer Gage | micrometers |
| 482,572 | Sep. 13, 1892 | T.S. Disston | Saw Filing Machine | filing machines |
| 493,444 | Mar. 14, 1893 | L.O. Orton | Mortising-bit | drill bits |
| 495,931 | Apr. 18, 1893 | T.S. Disston | Handsaw | compass saws |
| 530,793 | Dec. 11, 1894 | M. Odgers | Metal Saw | saw teeth |
| 968,372 | Aug. 23, 1910 | G.O. Leopold | Ball-bearing | tool making machines |
| 982,510 | Jan. 24, 1911 | G.O. Leopold | Ratchet mechanism | eggbeater drills |
