Granted Patent
Utility
US 4,242,583 · App. 05/900,380
X-ray imaging variable resolution
Inventors:
Martin Annis, Edwin Frederick
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Apr 26, 1978
Inventors
Martin Annis
Edwin Frederick
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.