Granted Patent
Utility
US 4,243,222 · App. 06/023,083
Seesaw targets apparatus for pinball game
Inventors:
Irwin J. Grabel, Peter J. Hanchar
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Mar 23, 1979
Inventors
Irwin J. Grabel
Peter J. Hanchar
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.