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| All Patents in class 74/345 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 775,503 | Nov. 22, 1904 | W. Langdon-Davies, A. Soames | Change Speed Gear | ||
 | 1,111,326 | Sep. 22, 1914 | W.L. Schellenbach | Gearing | |
 | 1,250,363 | Dec. 18, 1917 | W.L. Schellenbach | Initial driving mechanism | |