| Patents for Archibald M. O'Brien |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 815,642 | Mar. 20, 1906 | W.T. Sears | Speed-changer | metalworking machine mechanisms |
| 837,969 | Dec. 11, 1906 | W.T. Sears | Speeder | metalworking machine mechanisms |
| 844,415 | Feb. 19, 1907 | W.T. Sears | Power-transmission device | metalworking machine mechanisms |
| 844,546 | Feb. 19, 1907 | W.T. Sears | Power-transmission device | metalworking machine mechanisms |
| 851,842 | Apr. 30, 1907 | W.T. Sears | Power-transmission device | metalworking machine mechanisms |
| 953,183 | Mar. 29, 1910 | W.T. Sears, H.J. Ruch | Boring or drilling machine | drill presses |
