Granted Patent
Utility
US 4,853,991 · App. 07/166,117
Bedding foundation having multiple-span sinuous wire springs
Inventor:
Chester R. Yates
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Mar 10, 1988
Inventor
Chester R. Yates
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.