| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for John Birkenhead | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 215,479 | May 20, 1879 | N.R. Pratt | Carriage-Wheel Wrench | axle nut wrenches that lock nut to wheel hub | |
| 272,849 | Feb. 27, 1883 | J. Birkenhead | Lathe | metal lathe accessories and attachments | |
| 303,975 | Aug. 26, 1884 | J. Birkenhead | Turret or tool-support | metal lathes | |
| 303,976 | Aug. 26, 1884 | J. Birkenhead | Anvil for Lathes | metal lathe accessories and attachments | |