| All Patents in class 33/471 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 866X | Apr. 29, 1808 | B. Dearborn | Combination Rule/Bevel | folding rules |
| 41,396 | Jan. 26, 1864 | J. Richards | Improvement in in Trying-Squares | try squares |
| 65,744 | Jun. 11, 1867 | W. Hay | Improvement in Scale-Rules | rule graduations |
| 128,417 | Jun. 25, 1872 | R. Nichol | Improvement in Combined Rules and Dividers | dividers |
| 161,392 | Mar. 30, 1875 | A.H. Dodd | Protractor | protractors |
| 597,464 | Jan. 18, 1898 | L. Girton | Framing Tool | special purpose gauges |
| 655,005 | Jul. 31, 1900 | S.L. Penfield | Contact Goniometer | goniometers |
| 672,213 | Apr. 16, 1901 | E.L. Holcomb | Angle Protractor | protractors |
| 840,628 | Jan. 08, 1907 | E.P. Johnson | Combination Rule and Bevel | rules |
| 1,243,343 | Oct. 16, 1917 | J.H. Roberts | Combination Tool | rules |
| 1,294,935 | Feb. 18, 1919 | . | Angle and Arc Dividing Ruler | rules |
| 1,299,978 | Apr. 08, 1919 | S.C. MacDowney | Measuring Instrument | calipers |
| 1,414,033 | Apr. 25, 1922 | J.R. Mahon | Protractor | protractors |
| 1,429,999 | Sep. 26, 1922 | E. Barlow | Combined Depth and Angle Gauge | protractors |
| 1,440,284 | Dec. 26, 1922 | O.L. Engstrom | Combination Rule | folding rules |
