Granted Patent
Utility
US 4,448,417 · App. 06/370,983
Pinball game with simulated projectile display
Inventors:
Norman R. Clark, George T. Christian
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Apr 22, 1982
Inventors
Norman R. Clark
George T. Christian
Assignee (at issue)
Bally Manufacturing 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.