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| All Patents in class 55/457 | |||||
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| Number | Date | Patentee | Title | Type | |
| 400,391 | Mar. 26, 1889 | E. Bretney | Dust-collector | waste collection mechanisms | |
| 943,233 | Dec. 14, 1909 | J. Boyle | Exhaust-muffler | mufflers | |
| 2,732,032 | Jan. 24, 1956 | A.G. Sandison | Dust collector | waste collection mechanisms | |