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| Patents for J. P. Theo. Lang | |||||
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| Number | Date | Patentee | Title | Type | |
| 260,424 | Jul. 04, 1882 | D. Shortsleeve | Machine for Ornamenting Stone | stone dressing machines | |
| 283,929 | Aug. 28, 1883 | D. Shortsleeve | Machine for Sawing Stone | stonemason | |