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| Patents for J. Thompson & Sons Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 620,941 | Mar. 14, 1899 | G.W. Lewis | Explosive Engine | ||
| 621,110 | Mar. 14, 1899 | G.W. Lewis | Gas or Vapor Engine | ||
| 640,393 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
| 640,394 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
| 640,672 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
| 640,673 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
| 640,674 | Jan. 02, 1900 | G.W. Lewis | Explosive Engine | ||
| 640,675 | Jan. 02, 1900 | G.W. Lewis | Explosive Engine | ||