| All Patents in class 279/68 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 148,788 | Mar. 17, 1874 | J.H. Westcott | Improvement in Chucks for Metal Lathes | metal lathe chucks |
| 309,206 | Dec. 16, 1884 | A.F. Cushman | Lathe-chuck | metal lathe chucks |
| 315,684 | Apr. 14, 1885 | J.H. Westcott | Drill-Chuck | drill press chucks |
| 315,685 | Apr. 14, 1885 | J.H. Westcott | Lathe-chuck | metal lathe accessories and attachments |
| 335,982 | Feb. 09, 1886 | J.H. Westcott | Lathe-chucks | metal lathe chucks |
| 343,411 | Jun. 08, 1886 | J.R. Westcott | Lathe-chuck | metal lathe chucks |
| 434,460 | Aug. 19, 1890 | C.T. Pratt | Drill-chuck | drill press chucks |
| 449,135 | Mar. 31, 1891 | C.T. Pratt | Drill Chuck | drill press chucks |
| 452,363 | May 19, 1891 | B. Dunn, G.W. Crommie | Drill Chuck | drill press chucks |
| 455,490 | Jul. 07, 1891 | C.T. Pratt | Drill-chuck | drill press chucks |
| 462,879 | Nov. 10, 1891 | C.T. Pratt | Drill Chuck | drill press chucks |
| 473,639 | Apr. 26, 1892 | C.T. Pratt | Sleeve for taper drills | drill press chucks |
| 608,061 | Jul. 26, 1898 | W.H. Merrell | Drill Chuck | drill press chucks |
| 627,480 | Jun. 27, 1899 | J.W. Carleton | Drill Chuck | drill press chucks |
