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| Patents for John Henry Westcott | |||||
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| Number | Date | Patentee | Title | Type | |
| 148,788 | Mar. 17, 1874 | J.H. Westcott | Improvement in Chucks for Metal Lathes | metal lathe chucks | |
| 315,684 | Apr. 14, 1885 | J.H. Westcott | Drill-Chuck | drill press chucks | |
| 315,685 | Apr. 14, 1885 | J.H. Westcott | Lathe-chuck | metal lathe accessories and attachments | |