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| All Patents in class 73/113.01 | |||||
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| Number | Date | Patentee | Title | Type | |
| 539,244 | May 14, 1895 | E.L. Abbott | Power Meter | steam engine power meters | |
| 575,202 | Jan. 12, 1897 | C.H. Bedell | Steam Engine Indicator | steam engine indicators | |
| 912,680 | Feb. 16, 1909 | B. Hopkinson | Steam Engine and Like Indicator | steam engine indicators | |