Granted Patent
Utility
US 6,674,838 · App. 10/010,305
X-ray tube having a unitary vacuum enclosure and housing
Inventor:
Vaughn Leroy Barrett
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Nov 8, 2001
Inventor
Vaughn Leroy Barrett
Assignee (at issue)
VARIAN MEDICAL SYSTEMS, 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.