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| Patents for William J. Knuff | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,552,374 | Jan. 05, 1971 | W.J. Knuff | Grinding Wheel Dresser | ||
| 3,662,732 | May 16, 1972 | W.J. Knuff, G. Banko | Grinding Wheel Dresser | ||