Granted Patent
Utility
US 4,698,928 · App. 06/796,327
Sign holder
Inventor:
Andrzej L. Soporowski
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Nov 7, 1985
Inventor
Andrzej L. Soporowski
Assignee (at issue)
Esselte Pendaflex 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.