| Patents for Hazard Knowles |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
| | 4,247X | Nov. 04, 1825 | H. Knowles | Springs for wagons |
 | 4,859X | Aug. 24, 1827 | H. Knowles | Plane stocks of cast iron |
| | 5,242X | Oct. 11, 1828 | H. Knowles | Mode of covering buildings |
 | 6,441X | Apr. 01, 1831 | H. Knowles | Improved mode of manufacturing wood-screws |
 | 7,733X | Aug. 29, 1833 | H. Knowles | Whiffletree |
 | 197 | Jun. 10, 1837 | A.M. Wilson | Mowing Machine |
 | 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 |
 | 6,039 | Jan. 16, 1849 | H. Knowles | Bearing for upright shafts |
 | 6,294 | Apr. 10, 1849 | H. Knowles | Planing-machine |
