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