Granted Patent
Utility
US 5,930,028 · App. 09/082,828
Split reciprocal polarization switch
Inventor:
Ernest Eisenhardt Bergmann
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: May 21, 1998
Inventor
Ernest Eisenhardt Bergmann
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.