| Patents for Pratt Chuck Co. |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 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 |
 | 455,689 | Jul. 07, 1891 | C.T. Pratt | Drill-chuck |
| | 462,879 | Nov. 10, 1891 | C.T. Pratt | Drill Chuck |
 | 473,639 | Apr. 26, 1892 | C.T. Pratt | Sleeve for taper drills |
 | 742,131 | Oct. 20, 1903 | C.T. Pratt | Apparatus for electroplating |
 | 969,805 | Sep. 13, 1910 | C.T. Pratt | Outlet-box |
 | 1,091,161 | Mar. 24, 1914 | C.T. Pratt | Producing armored cable |
