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| All Patents in class 420/123 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,252,869 | Aug. 19, 1941 | W.H. Shortell, L.D. Hawkridge | Hacksaw blade | hacksaws | |
| 2,289,081 | Jul. 07, 1942 | W.H. Shortell, L.D. Hawkridge | Hack saw blade | hacksaws | |