Granted Patent
Utility
US 5,111,579 · App. 07/450,917
Method for making a frameless acoustic cover panel
Inventor:
Carl W. Andersen
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Dec 14, 1989
Inventor
Carl W. Andersen
Assignee (at issue)
Steelcase 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.