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| All Patents in class 33/448 | |||||
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| Number | Date | Patentee | Title | Type | |
| 51,609 | Dec. 19, 1865 | D. Munson | Rolling Ruler | rules | |
| 297,717 | Apr. 29, 1884 | P.C. Rich | Ruler | rules | |
| 331,481 | Dec. 01, 1885 | M. Dittenhoefer | Six-Sided Rolling Ruler | rules | |
| 471,459 | Mar. 22, 1892 | V.M. Ariza | Ruler | rules | |