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| Patents for D. S. Tovell | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,050,790 | Jan. 21, 1913 | F.M. Bawden | Tire-tread | ||
| 1,276,445 | Aug. 20, 1918 | C.H. Taylor | Thread-cutter | lathe tools | |