Granted Patent
Utility
US 5,459,697 · App. 08/292,090
MWD surface signal detector having enhanced acoustic detection means
Inventors:
Wilson C. Chin, Kenneth H. Hamlin
Patented Case
View Patent ↗
Granted: Oct 17, 1995
Filed: Aug 17, 1994
Inventors
Wilson C. Chin
Kenneth H. Hamlin
Assignee (at issue)
Halliburton
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.