Granted Patent
Utility
US 5,408,441 · App. 08/109,833
Method for seismic exploration in artic regions
Inventors:
Frederick J. Barr, Gary A. Sitton, David Lee Nyland
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Aug 20, 1993
Inventors
Frederick J. Barr
Gary A. Sitton
David Lee Nyland
Assignee (at issue)
Halliburton
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.