| All Patents in class 33/388 |
Patents 31 -
45
of 59
      |
| Number | Date | Patentee | Title | Type |
| 577,772 | Feb. 23, 1897 | W.M. Morton | Spirit Inclinometer | inclinometers |
| 581,938 | May 04, 1897 | W.M. Morton | Inclinometer | inclinometers |
| 610,952 | Sep. 20, 1898 | T.M. Wilhelm, W. Stettler | Level | inclinometers |
| 651,037 | Jun. 05, 1900 | C.R. Hawkins | Combination Tool of Precision | squares |
| 655,561 | Aug. 07, 1900 | J. Kurig | Level Quadrant for High Elevation Guns | inclinometers |
| 662,925 | Dec. 04, 1900 | S. Fierbaugh | Track Gage | track gauges |
| 683,033 | Sep. 24, 1901 | E.E. Frederick | Spirit Level | spirit levels |
| 719,061 | Jan. 27, 1903 | J.A. Traut | Leveling Instrument | inclinometers |
| 730,568 | Jun. 09, 1903 | W. Potter | Combination Carpenter's Level | spirit levels |
| 730,597 | Jun. 09, 1903 | W.A. Stallsmith | Clinometer | clinometers |
| 740,255 | Sep. 29, 1903 | H.T. Dillon | Level | inclinometers |
| 743,100 | Nov. 03, 1903 | W. Potter | Carpenter's Level and Quadrant | spirit levels |
| 752,014 | Feb. 09, 1904 | L.A. Wiesman | Combined Level and Square | squares |
| 756,949 | Apr. 12, 1904 | R.B. Ferguson | Spirit Level | spirit levels |
| 781,749 | Feb. 07, 1905 | F.T. Stevens | Instrument for Squaring Stone | stone squaring tools |
