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| Patents for Andrew J. Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 603,484 | May 03, 1898 | A.J. Johnson | Automatic Turret Head for Lathes | metal lathe accessories and attachments | |
| 605,166 | Jun. 07, 1898 | A.J. Johnson | Lathe Chuck | metal lathe chucks | |
| 640,039 | Dec. 26, 1899 | C.T. Smith, A.J. Johnson | Pneumatic Drill. | pneumatic tools | |