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| Patents for Henry O. Putnam | |||||
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| Picture | Number | Date | Patentee | Title | |
| 133,483 | Nov. 26, 1872 | C.F. Putnam, Administrator, S.W. Putnam, Estate of (deceased) | Lathes for Turning Metal | ||
 | 140,727 | Jul. 08, 1873 | S.W. Putnam, Jr. | Improvement in nut-tapping machines | |
 | 177,884 | May 23, 1876 | S.W. Putnam, Jr. | Improvement in metal-turning lathes | |
 | D11,221 | Jun. 03, 1879 | S.W. Putnam | Design for metal-drilling machines | |