| All Patents in class 33/426 |
Patents 1 -
15
of 33
      |
| Number | Date | Patentee | Title | Type |
| 115,318 | May 30, 1871 | E.A. Hickman | Improvement in Apparatus for Illustrating Trigonometry | protractors |
| 307,787 | Nov. 11, 1884 | H.W. Merrill | Combination Try Square and Bevel gage | bevels |
| 315,388 | Apr. 07, 1885 | C.D. Cowgill | Plotter For Tinners' Use | squares |
| 330,799 | Nov. 17, 1885 | G.B. Orendorff | Protractor | protractors |
| 376,430 | Jan. 17, 1888 | S. Darling | Protractor | protractors |
| 407,285 | Jul. 16, 1889 | C. Ensminger | Combined Square, Level, Protractor, &c. | combination tools |
| 523,733 | Jul. 31, 1894 | E.L. Samuelson | Adjustable Triangle | protractors |
| 527,035 | Oct. 02, 1894 | G.G. Boswell | Bevel Attachment for Framing Square | bevels |
| 527,968 | Oct. 23, 1894 | J.J. Brown, P. Grabler | Square | squares |
| 590,215 | Sep. 21, 1897 | S.G. Edwards | Square | squares |
| 609,895 | Aug. 30, 1898 | C.A. Mitchell | Combined Drill Gage and Protractor | protractors |
| 718,817 | Jan. 20, 1903 | S.B. Terry, S.A. Caldwell | Protracting Square | bevels |
| 725,614 | Apr. 14, 1903 | W.G. Clements | Try Square | bevels |
| 736,042 | Aug. 11, 1903 | C.E. Waters | Combination Tool | handsaw depth gages |
| 825,727 | Jul. 10, 1906 | A.W. Hight | Combined Sqaure and Bevel | squares |
