Granted Patent
Utility
US 4,623,972 · App. 06/727,154
Half-tone dot imaging
Inventors:
Samuel Darby, George C. Manley
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Apr 25, 1985
Inventors
Samuel Darby
George C. Manley
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.