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| Patents Granted on 1838-09-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| AI13 | Sep. 20, 1838 | B. Woodcock | Plow | plows | |
| 935 | Sep. 20, 1838 | C.B. Rogers | Machine for preparing stuff for making window-sash | window making machines | |