| All Patents in class 33/338 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 168,567 | Oct. 11, 1875 | S. Holbrook | Railway Track-Gage | track gauges |
| 242,357 | May 31, 1881 | P. Nolan | Railroad Track Gage | track gauges |
| 329,895 | Nov. 10, 1885 | C.M. Ferguson | Railway Track Gage, Level and Gradient | track gauges |
| 331,329 | Dec. 01, 1885 | D.H. Rhodes | Combined Railway Track Gage and Level | inclinometers |
| 370,013 | Sep. 13, 1887 | O.B. Fuller | Pendulum Level | pendulum levels |
| 555,525 | Mar. 03, 1896 | W.W. Jeter, W.R. Payne | Track Gage | track gauges |
| 651,519 | Jun. 12, 1900 | F. Algoud | Railway Track Gage | special purpose gauges |
| 662,925 | Dec. 04, 1900 | S. Fierbaugh | Track Gage | track gauges |
| 1,066,188 | Jul. 01, 1913 | M.W. Downie | Combination track gauge and recorder | |
