Granted Patent
Utility
US 4,801,113 · App. 07/100,775
Apparatus and method for electrical heating of aircraft skin for background matching
Inventor:
Michel Engelhardt
Patented Case
View Patent ↗
Granted: Jan 31, 1989
Filed: Sep 24, 1987
Inventor
Michel Engelhardt
Assignee (at issue)
Grumman Aerospace 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.