| Patents for William U. Colthar |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 744,295 | Nov. 17, 1903 | W.U. Colthar | Spring-motor | sewing machines |
| 784,164 | Mar. 07, 1905 | W.U. Colthar, C.H. Kay | Vibrator | medical devices |
| 804,520 | Nov. 14, 1905 | W.U. Colthar | Cutting implement | paper cutting machines |
| 849,329 | Apr. 02, 1907 | W.U. Colthar | Manufacture of cutting-disks | paper cutting machines |
| 857,600 | Jun. 25, 1907 | W.U. Colthar | Paper-Hanger's Plumb Level | levels |
| 930,687 | Aug. 10, 1909 | F.A. Pfeifer | Adjustable vise | bench vises |
| 1,053,083 | Feb. 11, 1913 | J. Blizard, W.U. Colthar | Printer's square | printer |
| 1,091,196 | Mar. 24, 1914 | W.U. Colthar | Grave-vault | |
