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| Patents for William T. S. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 503,088 | Aug. 08, 1893 | W.T. Johnson | Taper Attachment for Lathes | metal lathe accessories and attachments | |
| 687,887 | Dec. 03, 1901 | W.T. Johnson | Backing-Off Attachment for Lathes | backing off attachments | |
| 706,665 | Aug. 12, 1902 | W.T. Johnson | Engine Lathe | metal lathes | |
| 971,243 | Sep. 27, 1910 | F. Kropf, W.T. Johnson, E.W. Blum | Relieving Attachment for Lathes | metal relieving attachments | |