Granted Patent
Utility
US 5,338,031 · App. 08/093,578
Combination tilt switch and playfield incline indicator
Inventors:
James A. Patla, James X. Glass
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Jul 19, 1993
Inventors
James A. Patla
James X. Glass
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.