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| All Patents in class 606/135 | |||||
| Number | Date | Patentee | Title | Type | |
| 560,383 | May 19, 1896 | P.J. Weder | Castrating Instrument | ||
| 2,447,474 | Aug. 17, 1948 | A.O. Hammond | Device For Expanding Rubber Rings | livestock emasculators | |
| 2,582,640 | Jan. 15, 1952 | C. Maddox | Castrating Band Applying Tool | livestock emasculators | |