| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 251/57 | |||||
      | |||||
| Number | Date | Patentee | Title | Type | |
| 2,224,377 | Dec. 10, 1940 | G.H. Clark | Refrigerating Apparatus | refrigeration apparatus | |
| 2,335,824 | Nov. 30, 1943 | E.J. Dillman | Valve | valves | |
| 2,493,297 | Jan. 03, 1950 | W.S. Landon | Orifice Cleaning Means | pipe and orifice cleaners | |