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| Patents for Harry H. Bridenthal | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 212,889 | Mar. 04, 1879 | H.H. Bridenthal | Road Engine | |
| 252,720 | Jan. 24, 1882 | H.H. Bridenthal | Road Engine | ||
 | 351,733 | Nov. 02, 1886 | H.H. Bridenthal | Road Engine | |