Granted Patent
Utility
US 6,694,556 · App. 10/077,007
Self-inflating mattress
Inventor:
James R. Stolpmann
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Feb 15, 2002
Inventor
James R. Stolpmann
Assignee (at issue)
HILL-ROM SERVICES, 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.