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| Patents for John H. Greenwood | |||||
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| Number | Date | Patentee | Title | Type | |
| 233,846 | Nov. 02, 1880 | J.H. Greenwood | Planer Chuck | metal planer chucks | |
| 240,513 | Apr. 26, 1881 | J.H. Greenwood | Planer Chuck | metal planer chucks | |