Granted Patent
Utility
US 4,856,923 · App. 07/051,478
Ribbon shield
Inventor:
Phil Smith
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: May 18, 1987
Inventor
Phil Smith
Assignee (at issue)
Data Products Corporation
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.