| Patents for North Brothers Manufacturing Co. |
Patents 46 -
60
of 137
      |
| Number | Date | Patentee | Title | Type |
| 894,673 | Jul. 28, 1908 | G.O. Leopold | Ratchet mechanism | ratcheting screwdrivers |
| 902,387 | Oct. 27, 1908 | T.J. Fegley | Detachable-blade screw-driver | screwdrivers |
| 902,957 | Nov. 03, 1908 | Z.T. Furbish | Locking mechanism for ratchet screw-drivers | spiral screwdrivers |
| 906,902 | Dec. 15, 1908 | G.O. Leopold | Speed-change gear | eggbeater drills |
| 908,872 | Jan. 05, 1909 | G.O. Leopold | Ball bearing | |
| 914,174 | Mar. 02, 1909 | S.G. North | Screw-holder for screw-drivers | screwdrivers |
| 917,033 | Apr. 06, 1909 | T.J. Fegley | Chuck | |
| 917,319 | Apr. 06, 1909 | G.O. Leopold | Breast-drill | breast drills |
| 939,042 | Nov. 02, 1909 | G.O. Leopold | Gearing | eggbeater drills |
| 948,850 | Feb. 08, 1910 | T.J. Fegley | Chuck | |
| 952,320 | Mar. 15, 1910 | T.J. Fegley | North Bros. version of the Millers Falls "protected spring" design. | drill accessories |
| 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 |
