Granted Patent
Utility
US 5,774,030 · App. 08/829,634
Parallel axis cylindrical microwave filter
Inventor:
Devon J. Gray
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Mar 31, 1997
Inventor
Devon J. Gray
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.