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| Patents for P. D. Westman | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,183,014 | May 16, 1916 | F.L. Lane, F.R. Weaver | Tool-mounting | matchers | |
| 1,183,015 | May 16, 1916 | F.L. Lane, F.R. Weaver | Cutter-head | cutterheads | |
| 1,213,888 | Jan. 30, 1917 | F.L. Lane | Matcher-head | cutterheads | |