Granted Patent
Utility
US 5,243,457 · App. 07/890,392
Material with enhanced visibility characteristics
Inventor:
Andrew B. Spencer
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: May 26, 1992
Inventor
Andrew B. Spencer
Assignee (at issue)
American Ingenuity, 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.