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| All Patents in class 33/431 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 45,535 | Dec. 20, 1864 | H. Taylor | Parallel Rule with Protractor | |
 | 48,454 | Jun. 27, 1865 | S.L. Simpson | Improvement in Rulers | |
 | 85,991 | Jan. 19, 1869 | R.A. Briggs | Improvements in combined rule and protractor | |
 | 102,957 | May 10, 1870 | D.M. Moore | Universal Square | |