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| All Patents in class 137/205 | |||||
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| Picture | Number | Date | Patentee | Title | |
| RE4,373 | May 09, 1871 | B. Holly | Improvement in Systems of Water-supplies for Cities | ||
| 1,587,864 | Jun. 08, 1926 | C.E. Sargent | Eductor | ||
 | 2,666,498 | Jan. 19, 1954 | W.L. Petersen | Suction cleaner | |