Granted Patent
Utility
US 4,763,899 · App. 06/694,701
Warm-up bat
Inventor:
W. Maynard Hundley
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Jan 25, 1985
Inventor
W. Maynard Hundley
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.