Granted Patent
Utility
US 6,098,448 · App. 09/061,078
In situ measurement apparatus and method of measuring soil permeability and fluid flow
Inventors:
William E. Lowry, Neva Gray Mason, Daniel Merewether
Patented Case
View Patent ↗
Granted: Aug 8, 2000
Filed: Apr 15, 1998
Inventors
William E. Lowry
Neva Gray Mason
Daniel Merewether
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.