Granted Patent
Utility
US 4,275,874 · App. 06/013,558
Extended stacker
Inventor:
John A. DiBlasio
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Feb 21, 1979
Inventor
John A. DiBlasio
Assignee (at issue)
Brandt-Pra, 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.