| All Patents in class 310/68R |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 228,888 | Jun. 15, 1880 | W.W. Griscom | Regulating Electro-Magnetic Motors | motor regulators |
| 269,605 | Dec. 26, 1882 | E. Thomson | Dynamo Electric Machine | electric motors |
| 925,254 | Jun. 15, 1909 | J.B. Wiard | Dynamo Electric MAchine | AC motors |
| 1,539,068 | May 26, 1925 | B.W. Brockett | Motor hand tool | handheld power drills |
| 1,539,069 | May 26, 1925 | B.W. Brockett | Handle for motor hand tools | handheld power drills |
| 1,712,237 | May 07, 1929 | H. Weichsel | Alternating-current motor | induction motors |
| 2,876,369 | Mar. 03, 1959 | O. Doerner | Portable power drill | handheld power tools |
| 3,085,169 | Apr. 09, 1963 | G.J. Abel | Speed-setting indicators for portable electric tools | handheld power drills |
| 3,093,782 | Jun. 11, 1963 | K.M. Sparrow | Synchronous motor | electric motors |
| 3,210,644 | Oct. 05, 1965 | K.M. Sparrow | Dynamo Electric Machine | electric generators |
| 3,458,793 | Jul. 29, 1969 | A.N. Tsergas | Permanent magnet motor for hand tools and speed control systems therefor | electric motors |
