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| All Patents in class 451/529 | |||||
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| Number | Date | Patentee | Title | Type | |
| 781,876 | Feb. 07, 1905 | F.N. Gardner | Abrading-disk | ||
| 794,495 | Jul. 11, 1905 | G. Gorton | Abrading Surface | grinding machines | |
| 794,496 | Jul. 11, 1905 | G. Gorton | Abrading Sheet | abrasive sheets | |
| 3,193,977 | Jul. 13, 1965 | H.N. Martin | Expandable Tool with Fluid Pressure Applicator | lapping tools | |