| All Patents in class 279/50 |
Patents 1 -
10
of 21
      |
| Picture | Number | Date | Patentee | Title |
 | 144,178 | Oct. 28, 1873 | C.V. Woerd | Watchmakers' Lathes |
| | 427,930 | May 13, 1890 | T. Suchland | Clutch for Holding Disks |
| | 506,178 | Oct. 03, 1893 | E. Koenig | Machine for Shaping Buttons of Mother of Pearl |
| | 549,915 | Nov. 19, 1895 | J.F. Healey | Pearl Button Turning Machine |
| | 628,730 | Jul. 11, 1899 | F. Harrington, A. Whitney | Work Holder for Lathe Spindles |
 | 855,280 | May 28, 1907 | V.E. Campbell | Interchangeable and Adjustable Screw Driver and Combined Tool Holder |
| | 935,977 | Oct. 05, 1909 | H.W. Haskell | Tool Holder |
| | 2,335,721 | Nov. 30, 1943 | F.G. Zagar | Indexing chuck |
 | 2,420,067 | May 06, 1947 | H.E. Crozier | Collet attachment for lathes or other metalworking machines |
 | 2,466,651 | Apr. 05, 1949 | F.G. Zagar | Chuck |
