| All Patents in class 73/712 |
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 |
| | 568,784 | Oct. 06, 1896 | E.L. Miller | Automatic Recording Instrument |
 | 603,391 | May 03, 1898 | F.L. Wolfe | Pressure-recorder |
| | 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 |
| | 829,614 | Aug. 28, 1906 | F.L. Wolfe | Pressure Recorder |
| | 877,198 | Jan. 21, 1908 | W.E. Jerauld | Automatic Recording Gage |
| | 897,311 | Sep. 01, 1908 | G. Spencer | Pressure Recorder |
| | 951,658 | Mar. 08, 1910 | A.P. Phillips | Pressure Recording Gage |
| | 1,063,281 | Jun. 03, 1913 | J.W. Motherwell | Recording-gage |
