| All Patents in class 474/37 |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 1,842,194 | Jan. 19, 1932 | V.H. Peterson | Variable speed mechanism for drills | drill presses |
| 2,032,015 | Feb. 25, 1936 | D.H. Heynau | Friction gear transmission | industrial machine speed and direction changing mechanisms |
| 2,199,491 | May 07, 1940 | D.H. Heynau | Friction gear transmission | industrial machine speed and direction changing mechanisms |
| 2,475,954 | Jul. 12, 1949 | W.E. Gerbing | Variable speed pulley | industrial machine pulleys and belt drive mechanisms |
| 2,475,955 | Jul. 12, 1949 | W.E. Gerbing | Variable pitch pulley | industrial machine pulleys and belt drive mechanisms |
| 2,893,253 | Jul. 07, 1959 | P.K. Beemer | Variable pitch pulley mechanism | industrial machine pulleys and belt drive mechanisms |
| 2,927,612 | Mar. 08, 1960 | J.W. Edgemond, Jr., H. Goldschmidt | Combination wood-working machine | tablesaws |
| 3,009,294 | Nov. 21, 1961 | T.J. Lindem, J. van Roojen | Grinder with wheel dresser | tool grinders |
| 3,049,932 | Aug. 21, 1962 | S.C. Straus | Variable Pitch Driving System | metalworking machine mechanisms |
| 3,154,959 | Nov. 03, 1964 | B.N. Palm | Variable speed drive | industrial machine pulleys and belt drive mechanisms |
