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| Patents Granted on 1808-04-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 857X | Apr. 25, 1808 | A. Reed | Churn | churns | |
| 858X | Apr. 25, 1808 | D. Cobb | Carriages for field artillery | ||
| 859X | Apr. 25, 1808 | N. Howe | Churn | churns | |
| 860X | Apr. 25, 1808 | J. Reeve | Mode of twisting whalebone for whips | whips | |
| 861X | Apr. 25, 1808 | B. Taylor | Mode of impelling boats, water or land carriages | nautical propulsion apparatus | |
| 862X | Apr. 25, 1808 | J. Jennings | Machine for making rivets | rivet making machines | |