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| Patents for Grinnell Corp. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,533,413 | Dec. 12, 1950 | J.H. Williams | Fluid Pressure Actuated C-Clamp | clamps | |
| 2,607,054 | Aug. 19, 1952 | J.H. Williams | Chucking Mechanism for Tapping Machine | tapping machines | |