| All Patents in class 33/454 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 14,396 | Mar. 11, 1856 | R. Eickemeyer | Improvement in Parallel Rulers | rules |
| 46,348 | Feb. 14, 1865 | E.C. Gillette | Improvement in Parallel Rules | rules |
| 52,616 | Feb. 13, 1866 | U. Smith | Combination Parallel Rule and Square | rules |
| 67,487 | Aug. 06, 1867 | E. Bostock | Improvement in adjustable parallel rulers | |
| 85,708 | Jan. 05, 1869 | F.A. Traut | Improvement in Parallel Rules | parallel rules |
| 194,587 | Aug. 28, 1877 | J. Daniels | Improvement in attachments for carpenters' squares | squares |
| 195,693 | Oct. 02, 1877 | H.K. Averill, Jr. | Attachment to Parallel Rulers | parallel rules |
| 224,962 | Feb. 24, 1880 | C.D. Sigsbee | Parallel Ruler | parallel rules |
| 363,025 | May 17, 1887 | A.J. Walker | Parallel Ruler for Sign Writers | parallel rules |
| 407,350 | Jul. 23, 1889 | J.J. Hamilton | Parallel Ruler | parallel rules |
| 433,264 | Jul. 29, 1890 | J.R. Anderson | Parallel Ruler | parallel rules |
| 785,756 | Mar. 28, 1905 | S.N. Nutz | Parallel Marking Rule | rules |
| 1,636,637 | Jul. 19, 1927 | T.S. Hutchinson | 12-in-1 Tool | rules |
