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| All Patents in class 431/153 | |||||
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| Number | Date | Patentee | Title | Type | |
| 404,830 | Jun. 11, 1889 | W.F. Folmer | Gas Burner | lamps | |
| 419,651 | Jan. 21, 1890 | W.F. Folmer | Gas Burner | lamps | |
| 419,652 | Jan. 21, 1890 | W.F. Folmer | Gas Burner | lamps | |