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| Patents for Allan-Diffenbaugh Wrench & Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,337,986 | Apr. 27, 1920 | A.C. Allan | Pliers, Wrench and the Like | pliers type wrenches | |
| 1,490,902 | Apr. 22, 1924 | A.C. Allan | Pliers, Wrench or the Like | pliers type wrenches | |