| All Patents in class 33/391 |
Patents 16 -
27
of 27
      |
| Number | Date | Patentee | Title | Type |
| 651,519 | Jun. 12, 1900 | F. Algoud | Railway Track Gage | special purpose gauges |
| 886,333 | Apr. 28, 1908 | D.H. Southward | Attachment for Levels | inclinometers |
| 917,179 | Apr. 06, 1909 | C. Sprigg | Measuring Instrument | pendulum levels |
| 917,699 | Apr. 06, 1909 | J.H. Wyatt | Level | inclinometers |
| 933,912 | Sep. 14, 1909 | A.J. Matter | Protractor Level | clinometers |
| 1,122,349 | Dec. 29, 1914 | C. Haley, W. Henry, J.H. Wyatt | Level | inclinometers |
| 1,295,352 | Feb. 25, 1919 | S. Mosher | Pendulum Level | inclinometers |
| 1,409,833 | Mar. 14, 1922 | H.A. Cook | Railroad Inclinometer | inclinometers |
| 1,410,283 | Mar. 21, 1922 | W. Bengel | Plumb and Level | inclinometers |
| 1,424,229 | Aug. 01, 1922 | C.E. Wyckoff | Inclinometer with Mulitple Readings | inclinometers |
| 1,430,535 | Oct. 03, 1922 | G.B. Cocayne | Inclinometer | inclinometers |
| 1,433,513 | Oct. 24, 1922 | C.D. Luce | Inclinometer with Direct-Reading Dial | inclinometers |
