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| All Patents in class 451/504 | |||||
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| Number | Title | Classification(s) | |||
| 408,876 | Grinding Tool | 451/504, 451/547, 451/559 | |||
| 1,847,299 | Sanding machine | 451/504 | |||
| 4,802,310 | Sander Attachment | 15/233, 451/357, 451/441, 451/504 | |||
| 6,739,961 | Abrasive band tightening apparatus | 451/499, 451/504, 451/514 | |||