| All Patents in class 33/398 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 17,870 | Jul. 28, 1857 | C. Cole | Adjustment Applied to Pendulum Levels | level adjustments |
| 69,602 | Oct. 08, 1867 | H. Baker, J.T. Zimmerman | Improvement in Plumb-Levels | pendulum levels |
| 320,506 | Jun. 23, 1885 | C. Schofield | Plumb Level | inclinometers |
| 363,140 | May 17, 1887 | J. Holly | Spirit Level | spirit levels |
| 901,727 | Oct. 20, 1908 | W.H. McKeen | Plumb Level | clinometers |
| 1,533,975 | Apr. 14, 1925 | C.A. Dene | Gauge or leveling device for electric or other drills | handheld power tool accessories |
| 5,974,676 | Nov. 02, 1999 | J.R. Beall, J.S. McGuire | Low profile plumb bob assembly | plumb bobs |
