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| Patents for Hazard Knowles | |||||
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| Number | Date | Patentee | Title | Type | |
| 12,134 | Jan. 02, 1855 | H. Knowles | Cutter for tonguing and grooving | cutters | |
| 14,160 | Jan. 29, 1856 | H. Knowles | Mortising tool | mortising machines | |
| RE629 | Nov. 30, 1858 | H. Knowles | Improvement in saw-mills | reciprocating sawmills | |
| 23,092 | Mar. 01, 1859 | H. Knowles | Improvement in fastening bands on bales and packages | ||
| 25,125 | Aug. 16, 1859 | H. Knowles | Improvement in clasps for fastening bands on cotton bales, &c. | ||