Granted Patent
Utility
US 5,566,638 · App. 08/542,427
Collapsible marker cone
Inventor:
Gary Rokosny
Patented Case
View Patent ↗
Granted: Oct 22, 1996
Filed: Oct 13, 1995
Inventor
Gary Rokosny
Assignee (at issue)
SPARTUS 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.