Granted Patent
Utility
US 5,939,669 · App. 08/971,889
Underground container
Inventors:
Lothar Finzel, Guenter Einsle
Patented Case
View Patent ↗
Granted: Aug 17, 1999
Filed: Nov 17, 1997
Inventors
Lothar Finzel
Guenter Einsle
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.