All Patents of Type: parallel rules |
Patents 1 -
8
of 8
|
Number | Date | Patentee | Title | Type |
453X | May 17, 1803 | J.J. Hawkins | Pentegraph and parallel ruler | parallel rules |
85,708 | Jan. 05, 1869 | F.A. Traut | Improvement in Parallel Rules | parallel rules |
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 |
933,798 | Sep. 14, 1909 | H. Van Altena | Parallel Ruler | parallel rules |