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| Patents for Charles H. Antrim | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,841,939 | Jan. 19, 1932 | J. de Koning, C.H. Antrim | Band saw structure | bandsaws | |
| D134,699 | Dec. 29, 1942 | C.H. Antrim | Design for a grinding machine | sharpening machines | |
| 2,384,414 | Sep. 04, 1945 | C.H. Antrim | Dust collector for grinding and other machines | ||