Granted Patent
Utility
US 5,321,213 · App. 08/013,263
Downhole epicyclic motion orbital seismic source
Inventors:
Jack H. Cole, Paul L. Buller, John B. Sinton, Marvin E. Janda
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Jan 29, 1993
Inventors
Jack H. Cole
Paul L. Buller
John B. Sinton
Marvin E. Janda
Assignee (at issue)
Conoco 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.