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Patents for H. G. Prost | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 1,078,919 | Nov. 18, 1913 | E.J. Hall | Internal-combustion engine | |
1,212,478 | Jan. 16, 1917 | E.J. Hall | Carburetor | ||
![]() | 1,347,623 | Jul. 27, 1920 | C.S. Evans | Vise |