Granted Patent
Utility
US 5,913,615 · App. 08/419,026
Open-closed sign structure
Inventor:
Michael Rellinger
Patented Case
View Patent ↗
Granted: Jun 22, 1999
Filed: Apr 10, 1995
Inventor
Michael Rellinger
Assignee (at issue)
Quartet Manufacturing Co.
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.