| All Patents in class 16/DIG.27 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 147,760 | Feb. 24, 1874 | A.H. Frank, G. Spire | Improvement in spindles | woodworking machine lubrication |
| 335,527 | Feb. 02, 1886 | W. Kratzer | Anti-friction journal-bearing | industrial machine bearings |
| 822,723 | Jun. 05, 1906 | R. Conrad | Ball-bearing | industrial machine bearings |
| 908,872 | Jan. 05, 1909 | G.O. Leopold | Ball bearing | |
| 1,005,538 | Oct. 10, 1911 | W.A. Greaves | Tail-stock | wood lathes |
| 1,059,313 | Apr. 15, 1913 | H.A. Perkins | Step bearing for machinery | woodworking machine mechanisms |
