Granted Patent
Utility
US 4,809,045 · App. 06/781,381
Insulated gate device
Inventor:
Hamza Yilmaz
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Sep 30, 1985
Inventor
Hamza Yilmaz
Assignee (at issue)
General Electric Company
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.