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| Patents for C. Oscar Porter | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 402,770 | May 07, 1889 | J.B. Rhodes | Saw-tooth-swaging device | |
 | 411,055 | Sep. 17, 1889 | C.O. Porter, A.D. Porter | Saw-tooth swage | |
 | 882,122 | Mar. 17, 1908 | C.O. Porter, A.D. Porter | Cutter-guard for buzz-planers | |
 | 940,940 | Nov. 23, 1909 | C.O. Porter | Rotary cutter-head | |