Granted Patent
Utility
US 4,564,290 · App. 06/430,886
Apparatus for determining image areas from films and plates
Inventors:
David D. Bell, Gary Dobson
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Sep 30, 1982
Inventors
David D. Bell
Gary Dobson
Assignee (at issue)
Harris Graphics
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.