Granted Patent
Utility
US 4,424,437 · App. 06/238,240
Hair dryer with remote sensing temperature control
Inventors:
Henry J. Walter, Frank Schwarz
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Feb 24, 1981
Inventors
Henry J. Walter
Frank Schwarz
Assignee (at issue)
Clairol Incorporated
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.