Granted Patent
Utility
US 4,728,159 · App. 06/754,372
Stackable file storage unit
Inventors:
Jack Solomon, Monte L. Levin, Andrzej L. Soporowski, Michael D. Jones
Patented Case
View Patent ↗
Granted: Mar 1, 1988
Filed: Jul 11, 1985
Inventors
Jack Solomon
Monte L. Levin
Andrzej L. Soporowski
Michael D. Jones
Assignee (at issue)
Esselte Pendaflex Corporation
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.