Granted Patent
Utility
US 6,744,875 · App. 09/762,169
Method for switching a first communication link to a second communication link between two communication systems
Inventors:
Klaus Wehrend, Klaus Wille
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Feb 2, 2001
Inventors
Klaus Wehrend
Klaus Wille
Assignee (at issue)
Siemens Aktiengesellschaft
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.