| All Patents in class 33/340 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 19,105 | Jan. 12, 1858 | L.C. Stephens | Carpenter's Rule | folding rules |
| 201,371 | Mar. 19, 1878 | W.P. Walter | Improvement in Combined Bevel, Square, and Level | try squares |
| 339,287 | Apr. 06, 1886 | C. Gates | Combined plumb, level, and square | levels |
| 369,547 | Sep. 06, 1887 | G. Nicolescu | Combined Try Square, Surface Gage, and Level | machinist levels |
| 439,458 | Oct. 28, 1890 | R.E. Woodruff | Combined Rule, Square, Bevel, Scribe-Gage, Spirit Level, and Dividers | bevels |
| 548,329 | Oct. 22, 1895 | F. Steemmerich | Key Seat Rule | rule attachments |
| 649,626 | May 15, 1900 | H. Braun | Adjustable Level and Gage Attachment for Squares | |
| 732,827 | Jul. 07, 1903 | S. Chambers | Combination Tool | bevel squares |
| 740,742 | Oct. 06, 1903 | J.F. Bush | Rule | wooden levels |
| 825,217 | Jul. 03, 1906 | S.E. Hodge, E.N. Hull | Combination square, level, bevel, and compass | bevels |
| 855,338 | May 28, 1907 | M.C. Raymond | Combination Tool | center squares |
| 895,560 | Aug. 11, 1908 | C.E. Heinrich | Miter-Gage | bevel squares |
| 1,120,443 | Dec. 08, 1914 | F. Buck | Level Rule | levels |
| 1,127,955 | Feb. 09, 1915 | M. Berthold | Caliper Gauge | measurement gauges |
