Granted Patent
Utility
US 4,771,857 · App. 06/816,391
Seismic vibrator support assembly
Inventor:
Dallas J. Martin
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Jan 6, 1986
Inventor
Dallas J. Martin
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.