Granted Patent
Utility
US 5,272,006 · App. 08/013,988
Matrix board material and mold and a method for making printing plates therefrom
Inventor:
Richard L. Maine
Patented Case
View Patent ↗
Granted: Dec 21, 1993
Filed: Feb 5, 1993
Inventor
Richard L. Maine
Assignee (at issue)
Lydall, 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.