Granted Patent
Utility
US 4,288,273 · App. 06/148,580
Method and apparatus for making corrugated board
Inventors:
Richard A. Butler, Bucky Crowley
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: May 12, 1980
Inventors
Richard A. Butler
Bucky Crowley
Assignee (at issue)
Butler Greenwich Inc.
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.