| All Patents in class 470/147 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | 68,555 | Sep. 03, 1867 | O.C. Burdict | Improved machine for heading bolts |
 | 88,981 | Apr. 13, 1869 | T.T. Prosser | Improvement in machines for heading bolts |
 | 97,351 | Nov. 30, 1869 | O.C. Burdict | Improved bolt-heading machine |
 | 100,928 | Mar. 15, 1870 | J. Root | Improved machine for heading bolts |
| | 123,822 | Feb. 20, 1872 | J. Greenwood | Improvement in machines for forging the heads of bolts |
| | 146,374 | Jan. 13, 1874 | J.R. Abbe | Bolt-Heading Machine |
 | 168,135 | Sep. 28, 1875 | O.C. Burdict | Machine For Forging Wrench-Bar Heads |
| | 334,464 | Jan. 19, 1886 | F. Philips | Bolt Heading Machine |
| | 334,465 | Jan. 19, 1886 | F. Philips | Bolt Heading Machine |
