Granted Patent
Utility
US 4,868,844 · App. 07/168,621
Mutileaf collimator for radiotherapy machines
Inventor:
Craig S. Nunan
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Mar 7, 1988
Inventor
Craig S. Nunan
Assignee (at issue)
Varian, Inc.
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.