Granted Patent
Utility
US 4,004,079 · App. 05/632,015
Method and apparatus for dual resolution photographic reproduction of line and continuous tone graphic materials
Inventor:
William Thomas Boston
Patented Case
View Patent ↗
Granted: Jan 18, 1977
Filed: Nov 14, 1975
Inventor
William Thomas Boston
Assignee (at issue)
Optronics International, LLC
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.