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| All Patents in class 251/295 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,205,818 | Nov. 21, 1916 | E.E. Thomas | Dash-pot | ||
| 2,451,799 | Oct. 19, 1948 | W.R. Brown | Valve Structure | metalworking machine vises | |