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| All Patents in class 34/228 | |||||
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| Number | Date | Patentee | Title | Type | |
| 125,098 | Mar. 26, 1872 | E.J. Sumner | Improvement in lumber driers | ||
| RE9,309 | Jul. 20, 1880 | E.J. Sumner | Lumber-drier | ||
| 1,675,284 | Jun. 26, 1928 | A.J. Vance | Drier for sheet material | veneer machines | |