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| All Patents in class 156/193 | |||||
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| Number | Date | Patentee | Title | Type | |
| 244,126 | Jul. 12, 1881 | W.D. Herschel | Friction-pulley | industrial machine pulleys and belt drive mechanisms | |
| 2,266,226 | Dec. 16, 1941 | A.W. Mall | Flexible hose and method of manufacturing | handheld power sanders | |