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| All Patents in class 156/297 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,919,956 | Jan. 05, 1960 | E.P. Ormsby | Sliding Way for Machine Tools and Method of Making Same | metalworking machine mechanisms | |
| 2,974,080 | Mar. 07, 1961 | W. Trible | Process of Construction of Machine Tools | milling machines | |