Granted Patent
Utility
US 5,494,286 · App. 08/315,556
Ball advancing device for a pinball game
Inventors:
Lawrence E. DeMar, Edward A. Estes, Brian Eddy, Patrick Lawlor
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Sep 30, 1994
Inventors
Lawrence E. DeMar
Edward A. Estes
Brian Eddy
Patrick Lawlor
Assignee (at issue)
Williams Electronics Games, 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.