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| All Patents in class 55/422 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 9,681X | May 23, 1836 | A. Whitney | Extinguisher and heat condenser (Spark extinguisher) | ||
 | 146,115 | Dec. 30, 1873 | G.C. Westover | Improvement in suction-tubes for planing-machines, &c. | |
| 335,923 | Feb. 09, 1886 | H. Hennig | Spark Arrester | ||
| 764,658 | Jul. 12, 1904 | H.C. Clay | Spark Arresting Smoke Stack | ||
| 880,385 | Feb. 25, 1908 | W.F. MacGregor | Spark Arrester | ||
| 1,986,378 | Jan. 01, 1935 | J.A. Smith | Apparatus for air purification | ||