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| All Patents in class 73/796 | |||||
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| Number | Date | Patentee | Title | Type | |
| 278,917 | Jun. 05, 1883 | A.H. Emery | Machine for testing the strength of materials | testing machines | |
| 278,918 | Jun. 05, 1883 | A.H. Emery | Machinery for testing the strength of metal | testing machines | |
| 552,873 | Jan. 07, 1896 | C.G. Barth, J.S. Bancroft, W. Sellers | Testing Machine | testing machines | |