Granted Patent
Utility
US 4,873,219 · App. 07/271,472
Desensitizable self-contained record material useful for security documents and the like
Inventors:
Robert W. Brown, Donald Churchill
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Nov 15, 1988
Inventors
Robert W. Brown
Donald Churchill
Assignee (at issue)
Appleton Papers 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.