Granted Patent
Utility
US 5,253,866 · App. 07/731,865
Ball with a passive sound device
Inventors:
Randall H. Moorman, Hansan Ma
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Jul 18, 1991
Inventors
Randall H. Moorman
Hansan Ma
Assignee (at issue)
Tonka 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.