Granted Patent
Utility
US 4,771,177 · App. 06/793,785
Point source for testing a gamma camera
Inventor:
Ronald C. Brown
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Nov 1, 1985
Inventor
Ronald C. Brown
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.