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| All Patents of Type: gas preheaters | |||||
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| Number | Date | Patentee | Title | Type | |
| 650,525 | May 29, 1900 | J. Craig, Jr. | Heater for Air Motors | gas preheaters | |
| 1,106,611 | Aug. 11, 1914 | C.J. Atkinson | Preheater for Gases | gas preheaters | |