Granted Patent
Utility
US 5,438,693 · App. 08/338,792
R. F. mixer
Inventor:
Ian COX
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Nov 8, 1994
Inventor
Ian COX
Assignee (at issue)
GEC-Marconi Ltd.
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.