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| All Patents in class 99/573 | |||||
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| Number | Date | Patentee | Title | Type | |
| 174,142 | Feb. 29, 1876 | C.B. Martin | Improvement in Nut-Crackers | nutcrackers | |
| 627,401 | Jun. 20, 1899 | W.H. Edwards | Adjustable Nut Cracker | nutcrackers | |
| 1,061,470 | May 13, 1913 | W.N. Cradick | Nutcracker | nutcrackers | |
| 1,331,351 | Feb. 17, 1920 | M.L. Minor | Nutcracker | nutcrackers | |
| 1,967,750 | Jul. 24, 1934 | V.S. Firestone | Nut cracker | ||
| 2,267,499 | Dec. 23, 1941 | W.F. Freidag | Nutcracker | ||