| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for William Derfer | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 72,582 | Dec. 24, 1867 | J.F. Allen | Handsaw | dovetail saws | |
| 76,580 | Apr. 14, 1868 | J.F. Allen | Improvement in steam-generator | stationary boilers | |
| 76,581 | Apr. 14, 1868 | J.F. Allen | Improvement in decarbonizing iron | foundryman | |