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| All Patents in class 406/198 | |||||
| Picture | Number | Date | Patentee | Title | |
| 1,473,785 | Nov. 13, 1923 | W.W. Gore | Dust Sprayer | ||
| 1,473,786 | Nov. 13, 1923 | W.W. Gore | Dust Sprayer | ||
| 1,473,787 | Nov. 13, 1923 | W.W. Gore | Dust Sprayer | ||