Granted Patent
Utility
US 6,456,201 · App. 09/660,625
Method and apparatus for measuring groundwater levels
Inventors:
David Mioduszewski, David Fischer, David B. Kaminski
Patented Case
View Patent ↗
Granted: Sep 24, 2002
Filed: Sep 13, 2000
Inventors
David Mioduszewski
David Fischer
David B. Kaminski
Assignee (at issue)
Q.E.D. Environmental Systems, Inc.
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.