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| All Patents in class 24/20R | |||||
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| Number | Date | Patentee | Title | Type | |
| 292,443 | Jan. 22, 1884 | W.S. Newson | Shingle Band | shingle bands | |
| 1,614,304 | Jan. 11, 1927 | G.T. Johnson | Hollow-chisel mortiser | mortising machines | |