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