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| Patents for Robt. H. Porter | |||||
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| Number | Date | Patentee | Title | Type | |
| 259,895 | Jun. 20, 1882 | C.H. Miller | Pipe Tongs | pipe tongs | |
| 260,771 | Jul. 11, 1882 | C.H. Miller | Monkey Wrench | screw adjust wrenches | |
| 273,874 | Mar. 13, 1883 | C.H. Miller | Attachment for Pipe Tongs or Wrenches | wrench jaw components | |
| 348,743 | Sep. 07, 1886 | J.A. Hurley | Cork Puller | bar corkscrews | |