Granted Patent
Utility
US 4,320,163 · App. 06/104,145
Three-dimensional ceiling board facing
Inventor:
William C. Schwartz
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Dec 17, 1979
Inventor
William C. Schwartz
Assignee (at issue)
Burlington Industries LLC
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.