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| Patents for Chalmers H. Randolph | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,972,316 | Sep. 04, 1934 | C.H. Randolph | Process of and apparatus for grinding internal surfaces of tubes | |
| 2,242,545 | May 20, 1941 | C.H. Randolph | Rubbing machine | ||