Granted Patent
Utility
US 4,685,162 · App. 06/854,531
Box spring having improved coil spring modules
Inventors:
Larry Higgins, Thomas J. Wells
Patented Case
View Patent ↗
Granted: Aug 11, 1987
Filed: Apr 22, 1986
Inventors
Larry Higgins
Thomas J. Wells
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.