| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | Patent number: | Patent Date: |
| Patents for J. Beaumont Percival | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 996,311 | Jun. 27, 1911 | T. Chatwin, T.P. Chatwin, J. Virtue | Die-head of screwing-machines | metal threading machines | |