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| All Patents in class 40/331 | |||||
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| Number | Date | Patentee | Title | Type | |
| 262,772 | Aug. 15, 1882 | S.J. Hoggson, G.C. Pettis | Organ-stop knob | musical instruments | |
| 2,224,195 | Dec. 10, 1940 | W.J. Parsons | Tool | brace handles | |