Granted Patent
Utility
US 4,293,640 · App. 06/170,885
Radiographic image enhancement
Inventor:
Norman L. Weinberg
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Jul 21, 1980
Inventor
Norman L. Weinberg
Assignee (at issue)
Minrad 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.