Granted Patent
Utility
US 5,649,331 · App. 08/459,322
Self-adjusting pressure relief support system and methodology
Inventors:
John W. Wilkinson, Richard W. Raburn, Thomas S. Hargest
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Jun 2, 1995
Inventors
John W. Wilkinson
Richard W. Raburn
Thomas S. Hargest
Assignee (at issue)
Span-America Medical Systems, 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.