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| All Patents in class 137/305 | |||||
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| Number | Date | Patentee | Title | Type | |
| AI72 | Jan. 16, 1845 | R.K. Colvin | Hydrant cock | ||
| 80,143 | Jul. 21, 1868 | Z.E. Coffin | Improvement in hydrants | hydrants | |
| 94,749 | Sep. 14, 1869 | B. Holly | Hydrant | plumber | |
| 554,166 | Feb. 04, 1896 | S.M. West, H.C. Atkinson | Hydrant | firehose and hydrant wrenches | |