Granted Patent
Utility
US 6,369,521 · App. 09/935,189
Starter circuit for an ion engine
Inventors:
Gilbert I. Cardwell, Jr., Thomas K. Phelps
Patented Case
View Patent ↗
Granted: Apr 9, 2002
Filed: Aug 22, 2001
Inventors
Gilbert I. Cardwell, Jr.
Thomas K. Phelps
Assignee (at issue)
HUGHES ELECTRONICS LIMITED
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.