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| Patents for Richard James Robbins | |||||
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| Number | Date | Patentee | Title | Type | |
| GB-188,919,421 | Dec. 03, 1889 | E.T. Smith, C.W. Graham, R.J. Robbins, H.H. Lake | Pipe Wrenches | pipe tongs | |
| CA-33,192 | Dec. 19, 1889 | E.T. Smith, C.W. Graham, R.J. Robbins | Pipe Wrench | pipe tongs | |