Granted Patent
Utility
US 5,111,042 · App. 07/469,481
Method and apparatus for generating particle beams
Inventors:
John L. Sullivan, Ning Xu
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Apr 11, 1990
Inventors
John L. Sullivan
Ning Xu
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.