| All Patents in class 409/223 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 156,705 | Nov. 10, 1874 | W.P. Hopkins | Gear Cutting Attachments for Lathes | gear making machines |
| 174,596 | Mar. 07, 1876 | C. Walker | Gear Cutting Attachment for Metal Lathe | metal lathe accessories and attachments |
| 276,346 | Apr. 24, 1883 | W. Scully, J. Brooks | Gear Cutter | gear making machines |
| 359,377 | Mar. 15, 1887 | G.F. Ballou | Gear Cutting Device for Lathes | metal lathe accessories and attachments |
| 432,621 | Jul. 22, 1890 | F. Holz | Milling Machine | indexers and dividers |
| 579,620 | Mar. 30, 1897 | J. Weber | Lathe | metal lathe accessories and attachments |
| 612,412 | Oct. 18, 1898 | C.L. Grohmann | Index-head for milling-machines | indexers and dividers |
| 876,574 | Jan. 14, 1908 | E.J. McClellan | Indexing or Dividing Head | indexers and dividers |
| 1,794,472 | Mar. 03, 1931 | F.H. Mussler | Hydraulic Change-Speed-Gear Mechanism | |
| 1,906,062 | Apr. 25, 1933 | J. Harley | Index Center | indexers and dividers |
| 2,042,258 | May 26, 1936 | H.R. Isler | Universal Dividing Head Quadrant | indexers and dividers |
| 2,045,685 | Jun. 30, 1936 | W.D. Archea | Transmission and Control Mechanism for Milling Machines | milling machines |
| 2,059,753 | Nov. 03, 1936 | J.Y. Scott, B.F. Stowell | Universal index head | indexers and dividers |
| 2,205,361 | Jun. 18, 1940 | E.J. Kearney, E.M. Kearney, A.J. Pitman, O.W. Carpenter, Jr., J.B. Armitage | Dividing Head | indexers and dividers |
| 2,309,241 | Jan. 26, 1943 | F.W. Curtis | Dividing Head | indexers and dividers |
