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| Patents for W. W. Holt | |||||
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| Number | Date | Patentee | Title | Type | |
| 838,355 | Dec. 11, 1906 | J.M. Realing | Combined Butt and Lock Gage | butt gauges | |
| 844,954 | Feb. 19, 1907 | A.S. Morange | Wrench | screw adjust wrenches | |
| 847,176 | Mar. 12, 1907 | C.A. Good | Clapboard Marker | clapboard markers | |
| 900,472 | Oct. 06, 1908 | H.P. Boettcher | Universal Indicator | measurement gauges | |
| 1,009,605 | Nov. 21, 1911 | F.I. Walker | Depth-Gage | depth gauges | |