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| Patents for C. Sidney Norris & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 194,221 | Aug. 14, 1877 | F.S. Clarkson | Improvement in cutter-heads for grooving and channeling | cutterheads | |
| 330,564 | Nov. 17, 1885 | E.H. Clarkson | Planing and matching machine | matchers | |