| All Patents in class 279/68 |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
 | 148,788 | Mar. 17, 1874 | J.H. Westcott | Improvement in Chucks for Metal Lathes |
 | 309,206 | Dec. 16, 1884 | A.F. Cushman | Lathe-chuck |
 | 315,684 | Apr. 14, 1885 | J.H. Westcott | Drill-Chuck |
 | 315,685 | Apr. 14, 1885 | J.H. Westcott | Lathe-chuck |
 | 335,982 | Feb. 09, 1886 | J.H. Westcott | Lathe-chucks |
 | 343,411 | Jun. 08, 1886 | J.R. Westcott | Lathe-chuck |
 | 434,460 | Aug. 19, 1890 | C.T. Pratt | Drill-chuck |
| | 449,135 | Mar. 31, 1891 | C.T. Pratt | Drill Chuck |
| | 452,363 | May 19, 1891 | B. Dunn, G.W. Crommie | Drill Chuck |
 | 455,490 | Jul. 07, 1891 | C.T. Pratt | Drill-chuck |
