Granted Patent
Utility
US 5,558,315 · App. 08/295,931
Multi-fold interlockable spring for use in mattress foundation assemblies
Inventors:
Eugen Constantinescu, Robert F. Wagner
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Aug 25, 1994
Inventors
Eugen Constantinescu
Robert F. Wagner
Assignee (at issue)
Ohio Mattress Company Licensing and Components Group
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.