Granted Patent
Utility
US 4,839,913 · App. 07/040,018
Shadowgraph imaging using scatter and fluorescence
Inventors:
Martin Annis, Paul Bjorkholm
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Apr 20, 1987
Inventors
Martin Annis
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.