Granted Patent
Utility
US 6,642,677 · App. 09/966,469
Linac focused by graded gradient
Inventor:
David Byron Douglas
Patented Case
View Patent ↗
Granted: Nov 4, 2003
Filed: Sep 28, 2001
Inventor
David Byron Douglas
Assignee (at issue)
Southeastern Universities Research Assn.
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.