Granted Patent
Utility
US 6,558,520 · App. 09/781,632
Circuit configuration for generating a virtual ground
Inventors:
Markus Amtmann, Stephan Bolz, Jürgen Rössler
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Feb 12, 2001
Inventors
Markus Amtmann
Stephan Bolz
Jürgen Rössler
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.