Granted Patent
Utility
US 4,789,054 · App. 07/003,067
Vending machine for returnable cartridges
Inventors:
Barry Shore, Michael Schwarzberger
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jan 14, 1987
Inventors
Barry Shore
Michael Schwarzberger
Assignee (at issue)
ABM Industries Incorporated
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.