Granted Patent
Utility
US 4,571,755 · App. 06/571,000
Frame support for sofa-sleeper
Inventor:
John Stevens
Patented Case
View Patent ↗
Granted: Feb 25, 1986
Filed: Jan 16, 1984
Inventor
John Stevens
Assignee (at issue)
LEGGETT & PLATT, INC.
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.