Granted Patent
Utility
US 6,708,784 · App. 10/069,206
Core barrel valve assembly
Inventor:
Thomas Borg
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Feb 21, 2002
Inventor
Thomas Borg
Assignee (at issue)
ATLAS COPCO CRAELIUS AB
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.