Granted Patent
Utility
US 4,291,663 · App. 06/118,140
Ball throwing machine
Inventors:
Gordon H. Buck, Otto L. Gabler, Eugene J. Kilroy, Richard A. Leoncavallo
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Feb 4, 1980
Inventors
Gordon H. Buck
Otto L. Gabler
Eugene J. Kilroy
Richard A. Leoncavallo
Assignee (at issue)
MATTEL, 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.