| All Patents in class 346/72 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 603,391 | May 03, 1898 | F.L. Wolfe | Pressure-recorder |
| | 615,161 | Nov. 29, 1898 | T. Gray | Continuous Engine Indicator |
| | 665,154 | Jan. 01, 1901 | F.L. Wolfe | Pressure Recorder |
| | 677,674 | Jul. 02, 1901 | C.J. Manning | Recording Gage of Steam Pressure on Boilers |
| | 689,529 | Dec. 24, 1901 | F.L. Wolfe | Recording Gage |
| | 829,614 | Aug. 28, 1906 | F.L. Wolfe | Pressure Recorder |
| | 1,028,154 | Jun. 04, 1912 | W.L. Trill | Continuous Indicator for Engines |
| | 1,352,150 | Sep. 07, 1920 | E. Schneider | Recorder for Fluid Pressure Presses |
