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| All Patents in class 451/531 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,037,582 | Sep. 03, 1912 | E.J. Bein | Joining abrasive sheets | ||
| 1,126,423 | Jan. 26, 1915 | C.H. Driver | Sandpaper belting | abrasives and holders | |
| 1,728,673 | Sep. 17, 1929 | C.H. Driver | Joint for abrasive belts | abrasives and holders | |