| Patents for William A. Barr |
Patents 16 -
30
of 46
      |
| Number | Date | Patentee | Title | Type |
| 864,632 | Aug. 27, 1907 | T.J. Fegley | Ice-cream freezer | |
| 882,936 | Mar. 24, 1908 | T.J. Fegley | Ice-cream freezer | |
| 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 |
| 906,902 | Dec. 15, 1908 | G.O. Leopold | Speed-change gear | eggbeater drills |
| 914,978 | Mar. 09, 1909 | W.H. Ridgway | Overflow device for pressure-tanks, &c. | hoists, winches, come-alongs |
| 917,319 | Apr. 06, 1909 | G.O. Leopold | Breast-drill | breast drills |
| 936,793 | Oct. 12, 1909 | C.R. Middleton | Cutting Tool for Planers, Lathes, &c. | lathe tools |
| 939,042 | Nov. 02, 1909 | G.O. Leopold | Gearing | eggbeater drills |
| 939,829 | Nov. 09, 1909 | J.R. Grundy | Insulating shaft-coupling | industrial machine shaft couplings |
| 952,320 | Mar. 15, 1910 | T.J. Fegley | North Bros. version of the Millers Falls "protected spring" design. | drill accessories |
| 967,055 | Aug. 09, 1910 | J.T. Pugh | Auger-Bit | auger bits |
| 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 |
