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| Patents for Frank Trier | |||||
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| Number | Date | Patentee | Title | Type | |
| 263,444 | Aug. 29, 1882 | F. Trier | Machine for Truing Grindstones | stone dressing machines | |
| 283,685 | Aug. 21, 1883 | F. Trier | Lathe for Dressing Stone | stoneworking lathes | |