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| All Patents in class 346/118 | |||||
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| Number | Date | Patentee | Title | Type | |
| 615,161 | Nov. 29, 1898 | T. Gray | Continuous Engine Indicator | steam engine indicators | |
| 1,028,154 | Jun. 04, 1912 | W.L. Trill | Continuous Indicator for Engines | steam engine indicators | |
| 1,352,150 | Sep. 07, 1920 | E. Schneider | Recorder for Fluid Pressure Presses | hydraulic presses | |