Granted Patent
Utility
US 4,369,534 · App. 06/199,052
Center reinforced mattress
Inventor:
Ronald E. Wright
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Oct 20, 1980
Inventor
Ronald E. Wright
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.