Granted Patent
Utility
US 6,137,621 · App. 09/146,017
Acoustic logging system using fiber optics
Inventor:
Jian-Qun Wu
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Sep 2, 1998
Inventor
Jian-Qun Wu
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.