| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 409/67 | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
 | 92,565 | Jul. 13, 1869 | B.F. Bee | Screw Threading Machine | |
| 230,825 | Aug. 03, 1880 | I.S. Schuyler | Machine for Cutting Screw Threads | ||
| 320,968 | Jun. 30, 1885 | F.H. Richards | Machine for Making Twist Drills | ||
| 392,582 | Nov. 13, 1888 | H.E. Boyd | Machine for Cutting Taps | ||
| 2,050,124 | Aug. 04, 1936 | E.G. Roehm | Spiral Milling Machine | ||
 | 7,651,383 | Jan. 26, 2010 | H.J. Stadfeld | Method of Lapping Gears | |