Granted Patent
Utility
US 4,294,910 · App. 06/177,283
Printing plates
Inventor:
Hans Wielinga
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Aug 11, 1980
Inventor
Hans Wielinga
Assignee (at issue)
Vickers, Inc.
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.