Granted Patent
Utility
US 5,373,721 · App. 08/014,374
Method and apparatus for scoring metal panels and resultant product
Inventors:
Robert E. Welsh, Ernest J. Clowes
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Feb 5, 1993
Inventors
Robert E. Welsh
Ernest J. Clowes
Assignee (at issue)
Aluminum Company of America
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.