Granted Patent
Utility
US 5,801,600 · App. 08/628,646
Variable differential phase shifter providing phase variation of two output signals relative to one input signal
Inventors:
Roger John Butland, William Emil Heinz
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: May 23, 1996
Inventors
Roger John Butland
William Emil Heinz
Assignee (at issue)
Deltec New Zealand 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.