Granted Patent
Utility
US 6,763,642 · App. 10/167,928
Grid for a suspended ceiling
Inventor:
William J. Platt
Patented Case
View Patent ↗
Granted: Jul 20, 2004
Filed: Jun 10, 2002
Inventor
William J. Platt
Assignee (at issue)
Worthington Armstrong Venture
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.