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| All Patents in class 451/33 | |||||
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| Number | Date | Patentee | Title | Type | |
| 347,981 | Aug. 24, 1886 | H.C. Albee | Manufacture of broom-handles | broom making machinery | |
| 2,938,312 | May 31, 1960 | A.W. Mall | Method of fabricating chain saw guide bars | handheld chainsaws | |