Granted Patent
Utility
US 6,603,216 · App. 09/974,074
Exciter circuit with ferro-resonant transformer network for an ignition system of a turbine engine
Inventor:
John Joseph Costello
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Oct 10, 2001
Inventor
John Joseph Costello
Assignee (at issue)
CHAMPION AEROSPACE 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.