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| Patents for John H. Parsons | |||||
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| Number | Date | Patentee | Title | Type | |
| 210,942 | Dec. 17, 1878 | G.E. Gay | Improvement in Ratchet Screwdrives | ratcheting screwdrivers | |
| 387,409 | Aug. 07, 1888 | J.H. Parsons, G.E. Gay | Screwdriver | screwdriver blades | |
| 437,297 | Sep. 30, 1890 | J.H. Parsons, G.E. Gay | Ratcheting Screwdriver | ratcheting screwdrivers | |
| 484,004 | Oct. 11, 1892 | G.E. Gay, J.H. Parsons | Screw-driver | spiral screwdrivers | |