| All Patents in class 33/475 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 21,861 | Oct. 19, 1858 | L. Yale, Jr. | Square Adjustment | squares |
| 296,157 | Apr. 01, 1884 | W.A. Gabriel | Try Square | try squares |
| 392,426 | Nov. 06, 1888 | R. Hayden | Try-Square | try squares |
| 707,301 | Aug. 19, 1902 | W. Chesterman | Engineer's Square | squares |
| 761,929 | Jun. 07, 1904 | C.L. Weld | Try Square | try squares |
| 2,126,896 | Aug. 16, 1938 | S. Koller | Angle Plate | angle bars and angle plates |
| 4,096,634 | Jun. 27, 1978 | A. Gudel | Method and Device for the Measurement of Angles on Space Planes | measurement gauges |
