Granted Patent
Utility
US 5,901,221 · App. 08/836,226
Driving stage for driving differential amplifiers of a subscriber line interface circuit
Inventors:
Hans Eriksson, Carl-Henrik Malmgren, Henrik Hellberg, Elisabeth Larsson
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: May 7, 1997
Inventors
Hans Eriksson
Carl-Henrik Malmgren
Henrik Hellberg
Elisabeth Larsson
Assignee (at issue)
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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.