Granted Patent
Utility
US 4,902,449 · App. 07/247,845
Evaporative cooler pad and method of forming same
Inventor:
Claude C. Hobbs
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Sep 22, 1988
Inventor
Claude C. Hobbs
Assignee (at issue)
Hobbs Bonded Fibers
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.