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| Patents for Daniel Rupert Porter | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-35,548 | Dec. 02, 1890 | D.R. Porter | Wrench | pipe wrenches | |
| CA-41,437 | Dec. 30, 1892 | D.R. Porter | Wrench | pipe wrenches | |
| 556,834 | Mar. 24, 1896 | D.R. Porter | Pipe Wrench | pipe wrenches | |
| CA-56,225 | Jun. 10, 1897 | D.R. Porter | Pipe-Wrench | ||