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| Patents Granted on 1804-03-23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 536X | Mar. 23, 1804 | J. Williams | Inclined Plane, Statical Wheel | inclined planes | |
| GB-180,402,754 | Mar. 23, 1804 | T. Rowntree | Machine for agitating and separating certain mixtures | churns | |