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| All Patents in class 34/89.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 471,459 | Mar. 22, 1892 | V.M. Ariza | Ruler | rules | |
| 807,148 | Dec. 12, 1905 | R. Bachia | Ruler (Desk type with clips to hold paper) | ||