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| Patents for William T. Johnston | |||||
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| Picture | Number | Date | Patentee | Title | |
| 590,134 | Sep. 14, 1897 | W.T. Johnston, E. Crawley, Jr. | Coffee Roasting Machine | ||
| 590,135 | Sep. 14, 1897 | W.T. Johnston, E. Crawley, Jr. | Coffee Roasting Machine | ||
| 590,567 | Sep. 28, 1897 | W.T. Johnston, E. Crawley, Jr. | Coffee Roasting Machine | ||
| 615,252 | Dec. 06, 1898 | W.T. Johnston, E. Crawley, Jr. | Coffee Roasting Machine | ||