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| Patents for T. E. Hardenbergh Jr. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 930,354 | Aug. 10, 1909 | H.N. Covell | Logging-locomotive | |
 | 966,479 | Aug. 09, 1910 | F.C. Schoen | Hydraulic telemotor | |
 | 994,876 | Jun. 13, 1911 | F.C. Schoen | Combined steam and hand steering engine | |