| Patents for Hazard Knowles |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 4,247X | Nov. 04, 1825 | H. Knowles | Springs for wagons | |
| 4,859X | Aug. 24, 1827 | H. Knowles | Plane stocks of cast iron | bench planes |
| 5,242X | Oct. 11, 1828 | H. Knowles | Mode of covering buildings | |
| 6,441X | Apr. 01, 1831 | H. Knowles | Improved mode of manufacturing wood-screws | screw machines |
| 7,733X | Aug. 29, 1833 | H. Knowles | Whiffletree | wagons and carts |
| 197 | Jun. 10, 1837 | A.M. Wilson | Mowing Machine | mowing machines |
| 367 | Aug. 31, 1837 | G. Hotchkiss | Yoke for horses or oxen | |
| 5,334 | Oct. 16, 1847 | A. Caldwell | Improvement in cutter-heads for planing-machines | cutters |
| 6,039 | Jan. 16, 1849 | H. Knowles | Bearing for upright shafts | industrial machine bearings |
| 6,294 | Apr. 10, 1849 | H. Knowles | Planing-machine | wood planers |
| 6,370 | Apr. 17, 1849 | H. Knowles | Cutter for tonguing and grooving | cutters |
| 6,738 | Sep. 25, 1849 | H. Knowles | Caul for veneers | veneer machines |
| 7,475 | Jul. 02, 1850 | H. Knowles, H.C. Bevington | Improvement in the cutters and rakers of a grain and grass harvester | harvesters |
| 7,603 | Aug. 27, 1850 | H. Knowles | Teeth for straight and circular saws | sawblades |
| 9,284 | Sep. 28, 1852 | H. Knowles | Saw mill | reciprocating sawmills |
