| Patents for Pratt Chuck Co. |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 455,689 | 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 |
| 742,131 | Oct. 20, 1903 | C.T. Pratt | Apparatus for electroplating | |
| 969,805 | Sep. 13, 1910 | C.T. Pratt | Outlet-box | electrical devices |
| 1,091,161 | Mar. 24, 1914 | C.T. Pratt | Producing armored cable | |
| 1,098,919 | Jun. 02, 1914 | C.T. Pratt | Machine for forming cable-armor | |
| 1,841,300 | Jan. 12, 1932 | W.T. Scarritt | Tubing | |
| 1,869,224 | Jul. 26, 1932 | W.T. Scarritt | Receptacle and method of making the same | fire extinguishers |
