Granted Patent
Utility
US 4,774,780 · App. 06/908,184
Bent resilient leaf spring pop-up display assemblies
Inventor:
Christopher S. Crowell
Patented Case
View Patent ↗
Granted: Oct 4, 1988
Filed: Sep 17, 1986
Inventor
Christopher S. Crowell
Assignee (at issue)
STRUCTURAL GRAPHICS, 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.