| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| All Patents in class 137/505.44 | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
| 2,187,038 | Jan. 16, 1940 | I.J. Knudson | Method of and Apparatus for Cold Control | ||
| 2,251,831 | Aug. 05, 1941 | I.J. Knudson | Refrigerating Apparatus | ||