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| Patents for H. J. Sprague | |||||
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| Number | Date | Patentee | Title | Type | |
| 139,177 | May 20, 1873 | G.P. Moloney | Improvment in Pipe Tongs | pipe tongs | |
| 140,561 | Jul. 01, 1873 | G. Warsop | Pipe Wrenches | pipe wrenches | |
| 143,908 | Oct. 21, 1873 | D.D. Ingram | Improved Pipe-Wrench | pipe wrenches | |