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| All Patents in class 81/36 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,799,393 | Apr. 07, 1931 | A.E. Rylander | Variable-Speed Brace Drill | braces | |
| 2,594,669 | Apr. 29, 1952 | C.D. Marshall | Gear-Operated Wrench Construction | ratchet wrenches | |