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| Patents for Simon Willard | |||||
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| Number | Date | Patentee | Title | Type | |
| 354X | Feb. 08, 1802 | S. Willard | Time Piece | clockmaker | |
| 807X | Nov. 30, 1807 | S. Willard | Machine for cutting and heading nails | nail making machines | |
| 3,144X | Dec. 08, 1819 | S. Willard | Improvement in clocks | clockmaker | |
| 6,969X | Mar. 16, 1832 | S. Willard | Making laths | lath making machines | |
| 7,048X | May 09, 1832 | S. Willard | Cutting veneers | veneer machines | |
| 9,816X | Jun. 30, 1836 | S. Willard | Saw Mill | sawmills | |