Granted Patent
Utility
US 4,274,579 · App. 06/068,647
Cellular tray-type carton
Inventor:
Francis V. Kulig
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Aug 22, 1979
Inventor
Francis V. Kulig
Assignee (at issue)
Federal Paper Board Co., 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.