Granted Patent
Utility
US 4,287,673 · App. 06/111,413
Hair dryer diffuser
Inventor:
Gilbert R. Wolter
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jan 11, 1980
Inventor
Gilbert R. Wolter
Assignee (at issue)
Sunbeam Corporation Limited
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.