Granted Patent
Utility
US 6,053,827 · App. 08/802,516
Metal bat with pressurized bladder in hitting zone and method of making same
Inventors:
Jack W. MacKay, Jr., Kaye K. MacKay, Jack W. MacKay, III
Patented Case
View Patent ↗
Granted: Apr 25, 2000
Filed: Feb 20, 1997
Inventors
Jack W. MacKay, Jr.
Kaye K. MacKay
Jack W. MacKay, III
Assignee (at issue)
Hillerich & Bradsby Co.
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.