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| All Patents in class 137/351 | |||||
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| Number | Date | Patentee | Title | Type | |
| 639,490 | Dec. 19, 1899 | T.R. Almond | Automobile | motor vehicles | |
| 1,587,864 | Jun. 08, 1926 | C.E. Sargent | Eductor | sewage treatment apparatus | |