Granted Patent
Utility
US 5,347,241 · App. 08/014,586
Dual junction back-to-back microstrip four-port circulators
Inventors:
Steve K. Panaretos, Clifton Quan
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Feb 8, 1993
Inventors
Steve K. Panaretos
Clifton Quan
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.