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| Patents for John Betz | |||||
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| Number | Date | Patentee | Title | Type | |
| 245,816 | Aug. 16, 1881 | G. Grill | Circular-saw guard | woodworking machine safety guards | |
| 245,817 | Aug. 16, 1881 | G. Grill | Rosette-machine | wood ornamenting machines | |