| All Patents in class 33/454 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 14,396 | Mar. 11, 1856 | R. Eickemeyer | Improvement in Parallel Rulers |
 | 46,348 | Feb. 14, 1865 | E.C. Gillette | Improvement in Parallel Rules |
 | 52,616 | Feb. 13, 1866 | U. Smith | Combination Parallel Rule and Square |
 | 67,487 | Aug. 06, 1867 | E. Bostock | Improvement in adjustable parallel rulers |
 | 85,708 | Jan. 05, 1869 | F.A. Traut | Improvement in Parallel Rules |
 | 194,587 | Aug. 28, 1877 | J. Daniels | Improvement in attachments for carpenters' squares |
| | 195,693 | Oct. 02, 1877 | H.K. Averill, Jr. | Attachment to Parallel Rulers |
 | 224,962 | Feb. 24, 1880 | C.D. Sigsbee | Parallel Ruler |
| | 363,025 | May 17, 1887 | A.J. Walker | Parallel Ruler for Sign Writers |
| | 407,350 | Jul. 23, 1889 | J.J. Hamilton | Parallel Ruler |
