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| Patents for Charles R. Penfield | |||||
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| Number | Date | Patentee | Title | Type | |
| 44,774 | Oct. 18, 1864 | C.R. Penfield | Machine for making tackle-blocks | pulley making machines | |
| 396,763 | Jan. 29, 1889 | C.R. Penfield | Machine for sawing staves | barrel making machines | |
| 448,254 | Mar. 17, 1891 | C.R. Penfield | Cutter head | cutterheads | |