Granted Patent
Utility
US 5,452,889 · App. 08/192,134
Ball striking device
Inventors:
David Lewinski, John F. Mayer, Carol L. Guthrie
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Feb 4, 1994
Inventors
David Lewinski
John F. Mayer
Carol L. Guthrie
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.