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| All Patents in class 425/89 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,640X | Jan. 17, 1827 | J. Putnam | Mode of making pipes, tubes, etc. | ||
| 9,049X | Aug. 20, 1835 | J. Putnam | Fireplaces, stoves, composition slabs for lining | ||
 | 492,206 | Feb. 21, 1893 | M.E. Hunter, J.O. Clark | Machine for molding oval or other shapes from plastic material | |