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| Patents Granted on 1826-03-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,375X | Mar. 28, 1826 | J. Parker | Spiral moulding brick press | brick maker | |
| 4,376X | Mar. 28, 1826 | J. Parker | Mortar tub mill | brick maker | |