Granted Patent
Utility
US 5,928,549 · App. 08/822,623
Etched foil heater for low voltage applications requiring uniform heating
Inventor:
Richard W. Hitzigrath
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Mar 21, 1997
Inventor
Richard W. Hitzigrath
Assignee (at issue)
Cox & Company, 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.