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| All Patents in class 415/212.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 571,898 | Nov. 24, 1896 | W.W. Dingee | Pneumatic Stacker | hay or straw stackers | |
| 1,423,190 | Jul. 18, 1922 | G. Clements | Blower | handheld power blowers | |