Granted Patent
Utility
US 4,428,207 · App. 06/307,430
Dehumidifier
Inventor:
William B. Hall
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Oct 9, 1981
Inventor
William B. Hall
Assignee (at issue)
Martin Industries, Inc.
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.