Granted Patent
Utility
US 4,584,727 · App. 06/623,089
Sofa bed spring improvements
Inventors:
Bernard Reiss, Irl E. Ward
Patented Case
View Patent ↗
Granted: Apr 29, 1986
Filed: Jun 21, 1984
Inventors
Bernard Reiss
Irl E. Ward
Assignee (at issue)
Sealy of Maryland and Virginia, 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.