Granted Patent
Utility
US 4,908,804 · App. 07/212,670
Combinatorial coded telemetry in MWD
Inventor:
Louis H. Rorden
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Jun 28, 1988
Inventor
Louis H. Rorden
Assignee (at issue)
Develco, 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.