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| All Patents in class 222/509 | |||||
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| Number | Date | Patentee | Title | Type | |
| 434,723 | Aug. 19, 1890 | F.H. Richards | Regulator for Grain Weighers | grain scales | |
| 523,254 | Jul. 17, 1894 | F.D. Winkley | Oil-can | oil cans | |
| 1,883,282 | Oct. 18, 1932 | O.U. Zerk | Lubicating Apparatus | ||