Granted Patent
Utility
US 5,408,071 · App. 08/063,577
Electric heater with heat distributing means comprising stacked foil layers
Inventors:
G. William Ragland, Boyd A. Barnard
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: May 19, 1993
Inventors
G. William Ragland
Boyd A. Barnard
Assignee (at issue)
ATD Corporation
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.