Granted Patent
Utility
US 5,774,419 · App. 08/665,471
High speed point derivative microseismic detector
Inventors:
James E. Uhl, Norman R. Warpinski, Ernest Blayne Whetten
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Jun 18, 1996
Inventors
James E. Uhl
Norman R. Warpinski
Ernest Blayne Whetten
Assignee (at issue)
Gas Research Institute
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.