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| Patents for Herbert F. Harden | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 725,141 | Apr. 14, 1903 | C.F. Laur, A.E. Robinson | Speed Changing Mechanism | |
 | 761,324 | May 31, 1904 | W.L. Schellenbach | Speed Changing Mechanism | |