Granted Patent
Utility
US 5,358,448 · App. 08/090,240
Bumper bowling game and erratically rollable weighted bowling ball
Inventor:
Michael W. Stephens
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Jul 13, 1993
Inventor
Michael W. Stephens
Assignee (at issue)
AMF Bowling, 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.