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| All Patents in class 55/287 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 608,587 | Aug. 09, 1898 | E.R. Draver | Dust-collector | ||
| 641,681 | Jan. 23, 1900 | E.R. Draver | Dust-collector | ||
| 699,460 | May 06, 1902 | E.R. Draver | Dust-collector | ||