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| Patents for Henry Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 372X | May 10, 1802 | H. Johnson | Improvement in Flat Roofs for Houses and Balconies | roofs | |
| 6,305X | Dec. 23, 1830 | H. Johnson | Gumming the teeth from crosscut and sawmill saws | sawmills | |
| 8,848X | May 29, 1835 | H. Johnson | Thrashing machine | miller | |
| 194 | May 15, 1837 | N. Johnson, H. Johnson | Sawmill-gate clasps | sawmills | |
| 539,584 | May 21, 1895 | H. Johnson | Spindle lathe | wood lathes | |
| 1,428,781 | Sep. 12, 1922 | H. Johnson | Micrometer Adapter | measurement gauges | |