Granted Patent
Utility
US 4,763,455 · App. 06/505,369
Interior corner drywall bead
Inventor:
Joseph W. Schneller
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jun 16, 1983
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.