Granted Patent
Utility
US 4,367,039 · App. 06/356,966
Wet modular film printer
Inventor:
Walter Hrastnik
Patented Case
View Patent ↗
Granted: Jan 4, 1983
Filed: Mar 11, 1982
Inventor
Walter Hrastnik
Assignee (at issue)
Bell and Howell, 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.