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| Patents for William Lelgemann | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,500,787 | Mar. 14, 1950 | W. Lelgemann | Fluid Fuel Burner Apparatus for Effecting Diffusion Combustion | stationary boilers | |
| CA-468,242 | Sep. 19, 1950 | W. Lelgemann | Burner Apparatus and Methods of Effecting Diffusion Combustion | stationary boilers | |