Granted Patent
Utility
US 4,774,411 · App. 07/072,839
Gamma tomography apparatus
Inventor:
Francis J. Span
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Jul 13, 1987
Inventor
Francis J. Span
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.