Granted Patent
Utility
US 5,014,023 · App. 07/329,997
Non-dispersive variable phase shifter and variable length transmission line
Inventor:
John Earl Mantele
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Mar 29, 1989
Inventor
John Earl Mantele
Assignee (at issue)
Hughes Aircraft 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.