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| All Patents of Type: dyeing materials | |||||
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| Number | Date | Patentee | Title | Type | |
| 279X | Mar. 03, 1800 | J. Percy | Improvement in dying blue | dyeing materials | |
| 516X | Jan. 25, 1804 | T. Benger | Preparation of quercitron (black oak bark) for export or home use | dyeing materials | |
| 5,619X | Aug. 25, 1829 | R. Wood | Mode of Manufacturing Dye by Steam | dyeing materials | |