Granted Patent
Utility
US 4,593,823 · App. 06/557,851
Gravity feed display device
Inventors:
Jane S. Fershko, Robert W. Lackey
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Dec 5, 1983
Inventors
Jane S. Fershko
Robert W. Lackey
Assignee (at issue)
The Mead 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.