Granted Patent
Utility
US 6,463,813 · App. 09/344,069
Displacement based pressure sensor measuring unsteady pressure in a pipe
Inventor:
Daniel L. Gysling
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Jun 25, 1999
Inventor
Daniel L. Gysling
Assignee (at issue)
Weatherford/Lamb, 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.