Granted Patent
Utility
US 5,780,784 · App. 08/733,367
Cancellation of tool mode signal from combined signal
Inventor:
Carl A. Robbins
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Oct 17, 1996
Inventor
Carl A. Robbins
Assignee (at issue)
Halliburton Energy 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.