Granted Patent
Utility
US 6,502,458 · App. 09/079,095
Method for checking the operational readiness of a valve
Inventors:
Stephan Kruger, Paul Kradepohl, Norbert Steigleder
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: May 14, 1998
Inventors
Stephan Kruger
Paul Kradepohl
Norbert Steigleder
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.