| Patents for George O. Leopold |
Patents 1 -
15
of 80
      |
| Number | Date | Patentee | Title | Type |
| 864,633 | Aug. 27, 1907 | G.O. Leopold, T.J. Fegley | Screw holder for drivers | |
| 894,673 | Jul. 28, 1908 | G.O. Leopold | Ratchet mechanism | ratcheting screwdrivers |
| 906,902 | Dec. 15, 1908 | G.O. Leopold | Speed-change gear | eggbeater drills |
| 908,872 | Jan. 05, 1909 | G.O. Leopold | Ball bearing | |
| 917,319 | Apr. 06, 1909 | G.O. Leopold | Breast-drill | breast drills |
| 939,042 | Nov. 02, 1909 | G.O. Leopold | Gearing | eggbeater drills |
| 968,372 | Aug. 23, 1910 | G.O. Leopold | Ball-bearing | tool making machines |
| 977,957 | Dec. 06, 1910 | G.O. Leopold | Ratchet Mechanism for Screw-Drivers, &c. | ratcheting screwdrivers |
| 979,939 | Dec. 27, 1910 | G.O. Leopold, T.J. Fegley | Spiral tool-driver | hand drills |
| 982,510 | Jan. 24, 1911 | G.O. Leopold | Ratchet mechanism | eggbeater drills |
| 1,008,164 | Nov. 07, 1911 | G.O. Leopold | Ratchet Screw-Driver | ratcheting screwdrivers |
| 1,015,235 | Jan. 16, 1912 | G.O. Leopold | Gearing | eggbeater drills |
| 1,021,538 | Mar. 26, 1912 | G.O. Leopold | Gearing | eggbeater drills |
| 1,023,023 | Apr. 09, 1912 | G.O. Leopold | Gearing | hand drills |
| 1,033,712 | Jul. 23, 1912 | G.O. Leopold | Chain Drill | drill accessories |
