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| Patents for Waterous, Ltd. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,161,989 | Jun. 13, 1939 | D.M. Waterous | Screening paper pulp | |
 | 2,211,052 | Aug. 13, 1940 | L.A. Cole | Pressure limiting device | |
 | 2,211,646 | Aug. 13, 1940 | L.A. Cole | Valve | |
 | 2,358,626 | Sep. 19, 1944 | C.C. Cariss | Boiler construction | |
 | 2,732,032 | Jan. 24, 1956 | A.G. Sandison | Dust collector | |