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| Patents for Sterling Products Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,113,694 | Apr. 12, 1938 | O.A. Kehle | Rubbing machine | |
 | 2,123,426 | Jul. 12, 1938 | O.A. Kehle | Rubbing machine | |
 | 2,187,241 | Jan. 16, 1940 | O.A. Kehle | Oiler for air tools | |
 | 2,202,072 | May 28, 1940 | W.B. Wilson | Sanding and rubbing device | |
 | 2,204,017 | Jun. 11, 1940 | O.A. Kehle | Filter | |