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| All Patents in class 172/763 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 650,576 | May 29, 1900 | J. Wickstrom | Hot Air Engine | ||
| 1,437,032 | Nov. 28, 1922 | C.H. White | Tool Holder for Cultivators | ||
| 2,873,149 | Feb. 10, 1959 | E.C. Redetzke | Cultivator Tool Holder | ||