Granted Patent
Utility
US 6,539,708 · App. 09/640,152
Metering system
Inventors:
Lothar Hofmann, Wieland Mathes
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Aug 16, 2000
Inventors
Lothar Hofmann
Wieland Mathes
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.