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| All Patents in class 508/216 | |||||
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| Picture | Number | Date | Patentee | Title | |
| RE2,422 | Dec. 18, 1866 | J.H. Lester | Improved composition of matter for lubricating machinery and for other purposes | ||
| 1,804,234 | May 05, 1931 | J.C. Sharp | Wood Oil Feeded and Method of Producing the Same | ||