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| Patents for Albert Popkins | |||||
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| Number | Date | Patentee | Title | Type | |
| 549,573 | Nov. 12, 1895 | W.J. Letzkus | Keyway Cutter | milling machines | |
| 555,677 | Mar. 03, 1896 | P.P. Collins | Wrench | quick adjust wrenches | |
| D29,985 | Jan. 10, 1899 | D.F. Allerton | Wrench | wrenches | |