| All Patents in class 33/392 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 267,655 | Nov. 14, 1882 | W.C. Vajen | Plumb Bob | plumb bobs |
| 331,144 | Nov. 24, 1885 | J.J. Lawler | Plumb-Bob for Gas-Fittings | plumb bobs |
| 339,287 | Apr. 06, 1886 | C. Gates | Combined plumb, level, and square | levels |
| 342,303 | May 18, 1886 | J. Morrison | Combined Plumb, Level and Rule | plumbs |
| 630,262 | Aug. 01, 1899 | A. Nacke | Plumb Bob | plumb bobs |
| 714,957 | Dec. 02, 1902 | O.F. Sinigar | Plumb Level | plumbs |
| 787,896 | Apr. 25, 1905 | M.D. Converse | Plumb bob | plumb bobs |
| 1,003,499 | Sep. 19, 1911 | H. Platt | Support for Plumb-Bobs | plumb bobs |
| 1,170,591 | Feb. 08, 1916 | . | Combination Tool | |
| 1,212,194 | Jan. 16, 1917 | A.F. Duguid | Plumb-Bob | plumb bobs |
| 1,308,699 | Jul. 01, 1919 | W.L. Cusick | Combined Level, Plumb, and Gage | levels |
| 5,426,860 | Jun. 27, 1995 | L.G. Lee, J.S. Lynn, T.S. Gardiner | Plumb bob assembly | plumb bobs |
| 5,974,676 | Nov. 02, 1999 | J.R. Beall, J.S. McGuire | Low profile plumb bob assembly | plumb bobs |
