Granted Patent
Utility
US 4,322,619 · App. 06/093,027
Optical masking radiography
Inventors:
James A. Nelson, James A. Sorenson
Patented Case
View Patent ↗
Granted: Mar 30, 1982
Filed: Nov 9, 1979
Inventors
James A. Nelson
James A. Sorenson
Assignee (at issue)
THE UNIVERSITY OF UTAH
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.