Granted Patent
Utility
US 4,511,799 · App. 06/448,461
Dual energy imaging
Inventor:
Paul Bjorkholm
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Dec 10, 1982
Inventor
Paul Bjorkholm
Assignee (at issue)
American Science and Engineering, 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.