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| Patents for William F. Folmer | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,981,951 | Nov. 27, 1934 | W.F. Folmer | Adjustable Electrified Insect Screen | insect exterminators | |
| 1,985,921 | Jan. 01, 1935 | W.F. Folmer | Insect Electrocuting Device | insect exterminators | |
| 2,001,414 | May 14, 1935 | H.L. Chapin, W.F. Folmer | Insect Exterminator | insect exterminators | |
| 2,061,458 | Nov. 17, 1936 | H.L. Chapin, W.F. Folmer | Insect Exterminating Device | insect exterminators | |