Granted Patent
Utility
US 4,883,272 · App. 07/189,103
Ball catching frame with ball expelling machine connected thereto
Inventor:
William Coleman Lay
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: May 2, 1988
Inventor
William Coleman Lay
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.