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| All Patents in class 254/326 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 645,630 | Mar. 20, 1900 | R.A. Schultz, C.L. Schultz | Traction Engine | ||
| 819,226 | May 01, 1906 | C.O. Heggem | Traction Engine | ||
 | 1,422,459 | Jul. 11, 1922 | R.E. Manley | Portable floor crane | |
 | 2,549,120 | Apr. 17, 1951 | A.E. Ormsby | Crane | |