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| All Patents in class 425/593 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,416,349 | Feb. 25, 1947 | W.S. Renier | Molding Machine for Plastics and Other Moldable Materials | ||
| 2,460,468 | Feb. 01, 1949 | W.S. Renier | Molding Machine for Plastics and Other Moldable Materials | plastic molding machines | |
| 3,599,279 | Aug. 17, 1971 | D.I. McDonald | Clamping Mechanism | coolant apparatus | |
| 3,609,816 | Oct. 05, 1971 | D.I. McDonald | Hydraulic Clamping Mechanism | hydraulic apparatus | |