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| All Patents in class 221/273 | |||||
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| Number | Date | Patentee | Title | Type | |
| 276,639 | May 01, 1883 | W.S. Doig, T.L. Smith | Feeder for nailing-machines | nailing machines | |
| 925,088 | Jun. 15, 1909 | S. Grossman | Washer or button feeding attachment for setting-machines | ||