| All Patents in class 346/4 |
Patents 31 -
45
of 58
      |
| Number | Date | Patentee | Title | Type |
| 1,028,154 | Jun. 04, 1912 | W.L. Trill | Continuous Indicator for Engines | steam engine indicators |
| 1,028,155 | Jun. 04, 1912 | W.L. Trill | Continuous Indicator for Engines | steam engine indicators |
| 1,030,216 | Jun. 18, 1912 | J.N. Wallace | Indicator for Steam, Gas and Other Engines | steam engine indicators |
| 1,041,061 | Oct. 15, 1912 | A. Frisch | Indicating Mechanism | steam engine indicators |
| 1,043,825 | Nov. 12, 1912 | W.A. Griswold | Speed and Distance Indicating and Recording Device | speed and distance indicators |
| 1,056,950 | Mar. 25, 1913 | J.W. Sheperdson | Engine Indicator | steam engine indicators |
| 1,093,244 | Apr. 14, 1914 | C.W. Berry | Recorder | internal combustion engine indicators |
| 1,098,067 | May 26, 1914 | E. Vaughan | Steam Engine Indicator | steam engine indicators |
| 1,161,875 | Nov. 30, 1915 | H.C. Morrow | Gas Engine Recorder | internal combustion engine indicators |
| 1,182,628 | May 09, 1916 | C.W. Berry | Recorder | steam engine indicators |
| 1,201,557 | Oct. 17, 1916 | W.P. Clyde | Steam and Internal Combustion Engine Indicator | steam engine indicators |
| 1,280,354 | Oct. 01, 1918 | W.P. Holden, C.J. Zigler | Compression Recorder | internal combustion engine indicators |
| 1,352,150 | Sep. 07, 1920 | E. Schneider | Recorder for Fluid Pressure Presses | hydraulic presses |
| 1,376,883 | May 03, 1921 | L.E. Hunt | Engine Indicator | steam engine indicators |
| 1,407,352 | Feb. 21, 1922 | J.N. Nesbit | Horse Power Calculator and Recorder | steam engine indicators |
