Granted Patent
Utility
US 4,353,470 · App. 06/125,345
Vertically stackable tray set
Inventors:
Marlan H. Polhemus, Peter L. Ferrante
Patented Case
View Patent ↗
Granted: Oct 12, 1982
Filed: Feb 28, 1980
Inventors
Marlan H. Polhemus
Peter L. Ferrante
Assignee (at issue)
Tenex 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.