| All Patents in class 470/80 |
Patents 1 -
10
of 43
      |
| Picture | Number | Date | Patentee | Title |
| | 2,754 | Aug. 18, 1842 | C. Whipple | Machine for Making Wood Screws |
| | 4,106 | Jul. 10, 1845 | C. Whipple | Machine for Making Wood Screws |
| | 4,548 | May 30, 1846 | T.W. Harvey | Making Wood Screws |
| | 4,864 | Nov. 24, 1846 | T.J. Sloan | Making Wood Screws |
| | 42,766 | May 17, 1864 | H.A. Harvey | Improvement in Machines for Threading Wood-Screws |
| | 63,446 | Apr. 02, 1867 | G.H. Wells | Threading Screws |
| | 125,269 | Apr. 02, 1872 | J.M. Carpenter | Improvement in Machines for Threading Wood Screws |
 | 142,416 | Sep. 02, 1873 | J.J. Sheridan | Improvement in Boring and Drilling Machine |
| | RE7,573 | Mar. 27, 1877 | H.A. Harvey | Machine for Threading Wood Screws |
 | 256,546 | Apr. 18, 1882 | A.S. Cook | Wood-screw machine |
