Granted Patent
Utility
US 4,918,668 · App. 07/304,786
Marine vibrator tuneable array
Inventor:
John J. Sallas
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jan 30, 1989
Inventor
John J. Sallas
Assignee (at issue)
Halliburton Geophysical Services, 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.