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| Patents for William M. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,197X | Aug. 21, 1828 | W.M. Johnson | Casting printers' types | printer | |
| 104,077 | Jun. 07, 1870 | J. Strausbaugh, Jr. | Improvement in sawing-machine | human powered machines | |