| All Patents in class 33/392 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 267,655 | Nov. 14, 1882 | W.C. Vajen | Plumb Bob |
 | 331,144 | Nov. 24, 1885 | J.J. Lawler | Plumb-Bob for Gas-Fittings |
 | 339,287 | Apr. 06, 1886 | C. Gates | Combined plumb, level, and square |
| | 342,303 | May 18, 1886 | J. Morrison | Combined Plumb, Level and Rule |
| | 630,262 | Aug. 01, 1899 | A. Nacke | Plumb Bob |
| | 714,957 | Dec. 02, 1902 | O.F. Sinigar | Plumb Level |
 | 787,896 | Apr. 25, 1905 | M.D. Converse | Plumb bob |
 | 1,003,499 | Sep. 19, 1911 | H. Platt | Support for Plumb-Bobs |
| | 1,170,591 | Feb. 08, 1916 | . | Combination Tool |
 | 1,212,194 | Jan. 16, 1917 | A.F. Duguid | Plumb-Bob |
