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| All Patents in class 137/236.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,746 | Sep. 14, 1869 | B. Holly | Water Works | water distribution systems | |
| RE4,373 | May 09, 1871 | B. Holly | Improvement in Systems of Water-supplies for Cities | water distribution systems | |
| 1,144,094 | Jun. 22, 1915 | W.A. Barker | Water-circulation system for subways | ||