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Patents for Stephen W. Hall | |||||
Number | Date | Patentee | Title | Type | |
21,194 | Aug. 17, 1858 | S.W. Hall | Machine for cutting miters | miter machines | |
163,880 | Jun. 01, 1875 | S.G. Morrison | Improvement in modes of applying emery to metal surfaces | grinding wheels | |
172,337 | Jan. 18, 1876 | S.G. Morrison | Improvement in emery grinding-wheels | grinding wheels |