Granted Patent
Utility
US 4,624,087 · App. 06/675,624
Drywall exterior corner bead
Inventor:
Joseph W. Schneller
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Nov 28, 1984
Inventor
Joseph W. Schneller
Assignee (at issue)
National Gypsum Company
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.