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| All Patents in class 137/291 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,267X | Nov. 26, 1835 | S.T. Walker | Hydrant | hydrants | |
| 909 | Sep. 08, 1838 | J.M. Jorden | Improvement in Fire-Plugs and Hydrants to Prevent the Water From Freezing in Them | auxiliary wrenches | |
| 37,466 | Jan. 20, 1863 | R. Stileman | Improvement in hydrants | hydrants | |
| 93,658 | Aug. 10, 1869 | M. Zwiebel | Hydrant | wrenches | |