Granted Patent
Utility
US 5,007,073 · App. 07/454,029
Method and apparatus for obtaining a selectable contrast image in an X-ray film
Inventor:
James R. Craig
Patented Case
View Patent ↗
Granted: Apr 9, 1991
Filed: Dec 20, 1989
Inventor
James R. Craig
Assignee (at issue)
Gendex Corp.
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.