Granted Patent
Utility
US 4,692,912 · App. 06/676,718
Automatic force control for a seismic vibrator
Inventors:
Allan H. Mueller, Dean Perkins, Rhys Michael Evans
Patented Case
View Patent ↗
Granted: Sep 8, 1987
Filed: Nov 30, 1984
Inventors
Allan H. Mueller
Dean Perkins
Rhys Michael Evans
Assignee (at issue)
Geosource, 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.