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| All Patents in class 425/254 | |||||
| Number | Date | Patentee | Title | Type | |
| 6,043X | Jun. 22, 1830 | N. Adams | Brick machine | brick maker | |
| 1,654,761 | Jan. 03, 1928 | F.E. Stevenson | Hydraulic Brick Press | hydraulic presses | |