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| All Patents in class 34/224 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,332,706 | Mar. 02, 1920 | F.P. Boland | Drying process and apparatus | jeweler | |
| 1,675,284 | Jun. 26, 1928 | A.J. Vance | Drier for sheet material | veneer machines | |