Granted Patent
Utility
US 4,237,481 · App. 06/077,225
Image reproduction using sharp and unsharp signals
Inventor:
John E. Aughton
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Sep 20, 1979
Inventor
John E. Aughton
Assignee (at issue)
Crosfield Electronics Limited
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.