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| All Patents in class 425/416 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 83,010 | Oct. 13, 1868 | P. Walrath, J. Walrath | Improved brick-machine | ||
| 3,868,201 | Feb. 25, 1975 | R.A. Jackson, B.F. Janes | Powdered metal press | ||