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| Patents for H. J. Harrington | |||||
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| Number | Date | Patentee | Title | Type | |
| 172,306 | Jan. 18, 1876 | W. Esty | Planer-Chucks | metal planer accessories | |
| 177,884 | May 23, 1876 | S.W. Putnam, Jr. | Improvement in metal-turning lathes | metal lathe accessories and attachments | |
| 525,863 | Sep. 11, 1894 | S.W. Putnam | Metal Turning Lathe | engine lathes | |