| All Patents in class 33/376 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 9,867 | Jul. 19, 1853 | S.J. Sherman | Pocket Level |
 | RE374 | Jul. 01, 1856 | S.J. Sherman | Pocket Level |
 | 26,956 | Jan. 24, 1860 | J. Steger | Pocket-Level |
 | 69,602 | Oct. 08, 1867 | H. Baker, J.T. Zimmerman | Improvement in Plumb-Levels |
 | 407,285 | Jul. 16, 1889 | C. Ensminger | Combined Square, Level, Protractor, &c. |
 | 414,372 | Nov. 05, 1889 | J. Brakeley | Spirit Level |
| | 517,935 | Apr. 10, 1894 | A. Schnell | Spirit Level Attachment |
 | 565,098 | Aug. 04, 1896 | J.A. Traut | Level |
 | 819,965 | May 08, 1906 | H.S. Williams | Leveling Instrument |
 | 871,996 | Nov. 26, 1907 | J. Haugland, J. Jacobson | Folding Level |
