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| All Patents in class 68/9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,257 | Nov. 08, 1845 | M. Pierce | Bleaching Apparatus | ||
| 128,594 | Jul. 02, 1872 | A.N. Cole | Improvement in apparatus for separating oil from cotton-waste, &c. | ||