Granted Patent
Utility
US 5,504,807 · App. 08/136,623
Telephone apparatus with a continuously-connected DC-isolated modem
Inventors:
Peter Sattler, Victor Kravtchenko, Christian Krexner
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Oct 13, 1993
Inventors
Peter Sattler
Victor Kravtchenko
Christian Krexner
Assignee (at issue)
U.S. Philips Corporation
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.