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| Patents Granted on 1991-09-?? | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,045,033 | Sep. 03, 1991 | K. Kapton, B.D. Wixey | Dual arbor spindle | ||
| 5,048,236 | Sep. 17, 1991 | C.C. Williams | Saw Blade Tooth Grinder for Saws | saw sharpening machines | |
| 5,050,352 | Sep. 24, 1991 | M.R. Estabrook, C.R. Van Sickle | Honing stone assembly | honing machines | |