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| Patents for David Ackerman | |||||
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| Number | Date | Patentee | Title | Type | |
| 213,026 | Mar. 11, 1879 | D. Ackerman | Wrench For Inserting Bung-Bush | wrenches | |
| 218,106 | Aug. 05, 1879 | D. Ackerman | Bung-Bush Wrench | wrenches | |