| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for William Duff | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 9,406X | Feb. 17, 1836 | T. Murphy, W. Duff | Valve, puppet, raising, etc. | ||
| AI71 | Nov. 26, 1844 | W. Duff | Steam boiler safety valve | ||