Granted Patent
Utility
US 4,775,027 · App. 07/122,326
Seismic sound source
Inventor:
Tor-Arvid Haugland
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Nov 18, 1987
Inventor
Tor-Arvid Haugland
Assignee (at issue)
Western Atlas International, 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.