| Patents for William A. Barr |
Patents 31 -
45
of 46
      |
| Number | Date | Patentee | Title | Type |
| 979,967 | Dec. 27, 1910 | R.J. Koeberle | Saw-Clamp | saw vises |
| 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 |
| 1,022,311 | Apr. 02, 1912 | T.J. Fegley | Spiral Screw-Driver and Drill | spiral screwdrivers |
| 1,041,451 | Oct. 15, 1912 | T.J. Fegley, G.O. Leopold | Means for attaching blades of tools to handles | screwdrivers |
| D43,803 | Apr. 01, 1913 | G.O. Leopold | Design for a frame of bench-drills | drill presses |
| 1,059,132 | Apr. 15, 1913 | T.J. Fegley, G.O. Leopold | Bit storage handle for the North Bros. (e.g. 1530 & 1431) eggbeater drills. | drill accessories |
| D44,573 | Aug. 26, 1913 | G.O. Leopold | Design for a Screw-Driver | screwdrivers |
| 1,087,794 | Feb. 17, 1914 | G.O. Leopold | Bench-drill | drill presses |
| 1,103,782 | Jul. 14, 1914 | G.O. Leopold | Bench-drill | drill presses |
| 1,103,783 | Jul. 14, 1914 | G.O. Leopold | Drill | drill presses |
| 1,103,784 | Jul. 14, 1914 | G.O. Leopold | Change-speed mechanism | drill presses |
| 1,169,657 | Jan. 25, 1916 | G.O. Leopold | Drill | drill presses |
