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| Patents for Simplex Wrench Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-230,995 | May 15, 1923 | W.H. Cook | Fixed Jaw Ratchetting Spanner | nut wrenches | |
| 1,479,772 | Jan. 01, 1924 | W.H. Cook | Fixed Jaw Spanner | nut wrenches | |
| 1,624,508 | Apr. 12, 1927 | F.C. Reilly | Wrench | nut wrenches | |