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| All Patents in class 251/129.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,827,259 | Mar. 18, 1958 | E.T. Kindt | Automatic gate for dust collection system | waste collection mechanisms | |
| 2,916,018 | Dec. 08, 1959 | A.C. Nolte, C.F. Pabst | Control Mechanism | machine tool controls | |