Granted Patent
Utility
US 4,160,909 · App. 05/819,578
X-ray tube arrangements
Inventor:
Robert J. Froggatt
Patented Case
View Patent ↗
Granted: Jul 10, 1979
Filed: Jul 27, 1977
Inventor
Robert J. Froggatt
Assignee (at issue)
EMI, LLC
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.