Granted Patent
Utility
US 4,389,147 · App. 06/213,925
Can support system
Inventor:
Earl R. Van Alsburg
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Dec 8, 1980
Inventor
Earl R. Van Alsburg
Assignee (at issue)
American Can 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.