Granted Patent
Utility
US 4,357,524 · App. 06/116,515
Electrical heater controller for aircraft window heat control
Inventors:
Otto L. Apfelbeck, Joseph M. Urish
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Jan 29, 1980
Inventors
Otto L. Apfelbeck
Joseph M. Urish
Assignee (at issue)
Westinghouse Electric Company LLC
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.