Granted Patent
Utility
US 4,843,790 · App. 07/297,379
Casing trim
Inventor:
Salvatore R. Taravella
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Jan 17, 1989
Inventor
Salvatore R. Taravella
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.