Granted Patent
Utility
US 6,150,822 · App. 08/448,134
Sensor in bit for measuring formation properties while drilling
Inventors:
Harry Hong, Keith W. Katahara
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Jul 17, 1995
Inventors
Harry Hong
Keith W. Katahara
Assignee (at issue)
Atlantic Richfield Company
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.