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| All Patents in class 475/339 | |||||
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| Number | Date | Patentee | Title | Type | |
| 24,101 | May 24, 1859 | A.B. Colton | Horse-power machine | animal powered apparatus | |
| 2,216,800 | Oct. 08, 1940 | W.G. Baldenhofer | Hydraulic Control Device | hydraulic apparatus | |
| 2,295,299 | Sep. 08, 1942 | R.M. Shaw, Jr. | Power Transmission | metalworking power transmission | |