| All Patents in class 74/363 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 262,894 | Aug. 15, 1882 | G.H. Helvey | Traction Engine | steam traction engines |
| 265,499 | Oct. 03, 1882 | G.H. Helvey | Traction Engine | steam traction engines |
| 403,000 | May 07, 1889 | J.W. Stringer | Gearing for Road Engines | steam road engines |
| 707,890 | Aug. 26, 1902 | W.A. Wood | Variable-speed clutch | industrial machine clutches |
| 2,384,744 | Sep. 11, 1945 | W.G. Hoelscher | Drill Spindle Driving Mechanism | metalworking power transmission |
| 3,500,696 | Mar. 17, 1970 | W.A. Berube | Two-speed power tool | handheld power tools |
