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| Patents for Ralph T. Ingalls | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,126,423 | Jan. 26, 1915 | C.H. Driver | Sandpaper belting | |
 | 1,598,011 | Aug. 31, 1926 | C. Rasmussen | Metal-sawing machine | |
 | 1,758,973 | May 20, 1930 | C. Rasmussen | Pipe-threading machine | |
 | 1,780,439 | Nov. 04, 1930 | C. Rasmussen | Metal-sawing machine | |
 | 1,802,574 | Apr. 28, 1931 | C. Rasmussen | Nipple-holding chuck | |