| | ||
| Home| FAQ | Search:Advanced|Person|Company| Type|Class | Login | |
| Quick search: | ||
| Patents for Donald L. Campbell | |||||
      | |||||
| Picture | Number | Date | Patentee | Title | |
 | 2,451,804 | Oct. 19, 1948 | D.L. Campbell, H.Z. Martin, E.V. Murphree, C.W. Tyson | Method of and apparatus for contacting solids and gases | |