Granted Patent
Utility
US 5,490,369 · App. 08/327,566
Capping head with magnetic clutch
Inventors:
Darwin L. Ellis, James D. Duke, David A. Willis
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Oct 24, 1994
Inventors
Darwin L. Ellis
James D. Duke
David A. Willis
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.