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| Patents for E. C. Hard | |||||
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| Number | Date | Patentee | Title | Type | |
| 976,353 | Nov. 22, 1910 | H. Gansslen | Machine for making wired edges | ||
| 1,085,971 | Feb. 03, 1914 | W.H. Carrier | Method of humidifying air and controlling the humidity and temperature thereof | ||