Granted Patent
Utility
US 4,239,518 · App. 06/047,869
Refrigerated case with movable fan panel
Inventor:
Melvin W. Steelman
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jun 12, 1979
Inventor
Melvin W. Steelman
Assignee (at issue)
Tyler Refrigeration Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.