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| All Patents in class 222/211 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 54,394 | May 01, 1866 | L.H. Olmsted | Improvement in oilers | |
 | 152,332 | Jun. 23, 1874 | D.H. Chamberlain | Improvement in oilers | |