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| Patents Granted on 1981-07-07 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,276,799 | Jul. 07, 1981 | A.A. Muehling | Power tool apparatus | tablesaws | |
| 4,277,206 | Jul. 07, 1981 | E.W. Hilton | Adjustable Chip Breaker for a Cutting Tool | insert tool holders | |