Granted Patent
Utility
US 5,231,718 · App. 07/717,402
Combined cellular material and innerspring support system
Inventors:
Joseph W. Blaha, Thomas S. Halliday
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Jun 18, 1991
Inventors
Joseph W. Blaha
Thomas S. Halliday
Assignee (at issue)
Lumex, 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.