| All Patents in class 74/425 |
Patents 16 -
30
of 30
      |
| Number | Date | Patentee | Title | Type |
| 983,083 | Jan. 31, 1911 | J.A. Pealing | Portable drill | portable metal drilling machines |
| 1,134,795 | Apr. 06, 1915 | A. Winton | Gas Engine | gas and gasoline engines |
| 1,156,863 | Oct. 12, 1915 | D.T. Brownlee | Geared-Up Starter | starters |
| 1,173,307 | Feb. 29, 1916 | E.C. Clark, W.P. Reiboldt | Chain-grate stoker | solid fuel stokers |
| 1,216,775 | Feb. 20, 1917 | C.M. Conradson | Variable Speed Gearing | engine lathes |
| 1,253,199 | Jan. 08, 1918 | H.L. Zabriskie | Oscillating motor | |
| 1,341,701 | Jun. 01, 1920 | G.D. Alexander | Power-driven tool-driver | handheld power tools |
| 1,393,104 | Oct. 11, 1921 | F.O. Farwell | Driving Mechanism for Machine Spindles | metalworking machine mechanisms |
| 1,750,957 | Mar. 18, 1930 | C.D. Fowler | Drill attachment | handheld power tool accessories |
| 1,821,216 | Sep. 01, 1931 | F.G. Hobart, W.C. Heath | Pump | pumps |
| 2,195,911 | Apr. 02, 1940 | W.F. Zimmermann | Selective Worm Gear Table Drive | gear hobbing machines |
| 2,195,912 | Apr. 02, 1940 | W.F. Zimmermann | Worm Gearing | gear hobbing machines |
| 2,323,380 | Jul. 06, 1943 | D.M. Davis | Screw Machine | screw machines |
| 2,769,349 | Nov. 06, 1956 | O.A. Costello | Disconnectable Worm Gearing | industrial machine gearing |
| 3,468,179 | Sep. 23, 1969 | J.J. Hughes, R.K. Sedgwick | Recirculating ball worm drive | metalworking power transmission |
