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| All Patents in class 269/288 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,229 | Apr. 02, 1850 | H. Aiken | Clamp | ||
| 508,055 | Nov. 07, 1893 | W.C. Shipherd | Pencil-sharpening device | pencil sharpeners | |
| 700,071 | May 13, 1902 | E.L. McDivitt | Pencil Sharpener | pencil sharpeners | |
| 893,875 | Jul. 21, 1908 | F. Schneider | Drill Press Chuck | chucks | |