Granted Patent
Utility
US 4,240,230 · App. 06/005,927
Throw-away adaptors for grinding wheels
Inventor:
Salvatore Ferrantini
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jan 24, 1979
Inventor
Salvatore Ferrantini
Assignee (at issue)
Carborundum Corporation
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.