Granted Patent
Utility
US 4,622,688 · App. 06/613,655
X-ray tube comprising two successive layers of anode material
Inventors:
Willem H. Diemer, John N. Kikkert, Hubertus F. M. Wagemans
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: May 23, 1984
Inventors
Willem H. Diemer
John N. Kikkert
Hubertus F. M. Wagemans
Assignee (at issue)
U.S. Philips Corporation
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.