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| All Patents in class 228/155 | |||||
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| Number | Date | Patentee | Title | Type | |
| 162,422 | Apr. 20, 1875 | G.H. Sellers | Method of Enlarging the Ends of Metal-Bars | ||
| 2,827,552 | Mar. 18, 1958 | V. Berthelsen | Platen construction method | veneer machines | |
| 3,293,739 | Dec. 27, 1966 | C.W. Hoglund, A.G. Coy | Method of holding deformable objects | work holding | |