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| All Patents in class 251/61.4 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,520,386 | Aug. 29, 1950 | E.J. Dillman | Refrigeration Expansion Valve | ||
 | 3,905,408 | Sep. 16, 1975 | T.F. Hale | Vacuum flitch table for veneer slicer | |