| All Patents in class 73/712 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 41,182 | Jan. 05, 1864 | W.B. Le Van, S.L. Wiegand | Steam Engine Indicator | steam engine indicators |
| 568,784 | Oct. 06, 1896 | E.L. Miller | Automatic Recording Instrument | steam engine indicators |
| 603,391 | May 03, 1898 | F.L. Wolfe | Pressure-recorder | steam pressure gauges |
| 665,154 | Jan. 01, 1901 | F.L. Wolfe | Pressure Recorder | steam engine indicators |
| 677,674 | Jul. 02, 1901 | C.J. Manning | Recording Gage of Steam Pressure on Boilers | steam pressure gauges |
| 829,614 | Aug. 28, 1906 | F.L. Wolfe | Pressure Recorder | pressure indicators |
| 877,198 | Jan. 21, 1908 | W.E. Jerauld | Automatic Recording Gage | industrial recording apparatus |
| 897,311 | Sep. 01, 1908 | G. Spencer | Pressure Recorder | pressure indicators |
| 951,658 | Mar. 08, 1910 | A.P. Phillips | Pressure Recording Gage | pressure indicators |
| 1,063,281 | Jun. 03, 1913 | J.W. Motherwell | Recording-gage | recording gauges |
| 1,265,156 | May 07, 1918 | C.D. Young | Pressure Recorder | pressure indicators |
| 1,280,354 | Oct. 01, 1918 | W.P. Holden, C.J. Zigler | Compression Recorder | internal combustion engine indicators |
| 1,404,770 | Jan. 31, 1922 | F.H. Hopkins | Air Brake Recording Apparatus | industrial recording apparatus |
