| All Patents in class 346/49 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
| | 41,182 | Jan. 05, 1864 | W.B. Le Van, S.L. Wiegand | Steam Engine Indicator |
| | 615,161 | Nov. 29, 1898 | T. Gray | Continuous Engine Indicator |
| | 713,945 | Nov. 18, 1902 | E.C. Oliver, L.P. Beckenridge | Recording Machine |
| | 898,474 | Sep. 15, 1908 | M.W. Hogle | Continuous Engine Indicator |
| | 956,680 | May 03, 1910 | G. Cipollina | Steam Engine Power Gage |
| | 1,030,216 | Jun. 18, 1912 | J.N. Wallace | Indicator for Steam, Gas and Other Engines |
| | 1,056,950 | Mar. 25, 1913 | J.W. Sheperdson | Engine Indicator |
| | 1,352,150 | Sep. 07, 1920 | E. Schneider | Recorder for Fluid Pressure Presses |
| | 1,447,913 | Mar. 06, 1923 | W.C. Duryea, A. Trowbridge | Recording Indicator |
| | 1,511,574 | Oct. 14, 1924 | E.H. Mortsell | Indicating and Recording Instrument |
