| All Patents in class 474/79 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 2,237,555 | Apr. 08, 1941 | A.N. Haskell | Drive unit mounting | motor mounts |
| 2,441,775 | May 18, 1948 | G.B. Simonson | Belt shifter | industrial machine pulleys and belt drive mechanisms |
| 2,474,500 | Jun. 28, 1949 | F.K. Stein | High-low speed attachment for drill presses | industrial machine pulleys and belt drive mechanisms |
| 2,506,514 | May 02, 1950 | R.E. McKelvey | Reduction drive for drill presses and the like | industrial machine pulleys and belt drive mechanisms |
| 2,566,579 | Sep. 04, 1951 | F.L. Nichols | Multiple-speed drill press | drill presses |
| 2,650,506 | Sep. 01, 1953 | K.R. Montgomery | Speed reducer for drill presses and other belt-driven machines | industrial machine pulleys and belt drive mechanisms |
| 2,716,353 | Aug. 30, 1955 | J.E. Boice | Motor mountings | drill presses |
| 3,745,845 | Jul. 17, 1973 | G.L. Redman | Speed changer | industrial machine pulleys and belt drive mechanisms |
