| All Patents in class 74/347 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 103,515 | May 24, 1870 | J. Smith | Improved drilling-machine | drilling and boring |
| 415,439 | Nov. 19, 1889 | E.M. Birdsall | Traction Engine | steam traction engines |
| 451,811 | May 05, 1891 | J.H. Crumb | Traction Engine | traction engine propulsion components |
| 928,894 | Jul. 20, 1909 | J.S. Barnes | Variable-speed gearing | |
| 940,342 | Nov. 16, 1909 | R. Milne | Differential Postive Feed Mechanism | drill presses |
| 1,008,182 | Nov. 07, 1911 | R. Milne | Gearing for drill-presses | drill presses |
| 1,017,242 | Feb. 13, 1912 | A.B. Browne | Combined Breast Drill and Valve Grinder | combination tools |
| 1,045,200 | Nov. 26, 1912 | C.D. Severance | Breast Drill Gearing | breast drills |
