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Patents for John G. Ridout | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 209,771 | Nov. 12, 1878 | J. Nesbitt, A. Anderson | Improvements in curtain-rollers | |
221,950 | Nov. 25, 1879 | G.S. Woodruff | Gas-governors |