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| Patents for William L. Hall | |||||
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| Number | Date | Patentee | Title | Type | |
| 690,669 | Jan. 07, 1902 | J.F. Steckenreiter | Attaching device for drill bit | ||
| 699,855 | May 13, 1902 | J.F. Steckenreiter | Rotary Measure | wheel-based measurers | |