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| Patents for Alonzo W. Postlethwaite | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-57,238 | Aug. 28, 1897 | A.W. Postlethwaite, Z.Y. Postlethwaite, L.W. Everhart | Wrench | quick adjust wrenches | |
| 609,762 | Aug. 23, 1898 | L.W. Everhart | Wrench | quick adjust wrenches | |