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| All Patents in class 192/DIG.001 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,043,406 | Nov. 05, 1912 | R.J. Denio | Clutch | automobiles | |
| 1,567,717 | Dec. 29, 1925 | P. Dubosclard | Friction device | industrial machine clutches | |