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| Patents for Charles F. Laur | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 725,141 | Apr. 14, 1903 | C.F. Laur, A.E. Robinson | Speed Changing Mechanism | |
| 755,504 | Mar. 22, 1904 | A.E. Robinson, C.F. Laur | Variable Speed Mechanism | ||
 | 818,632 | Apr. 24, 1906 | C.F. Laur | Variable Speed Mechanism | |