Granted Patent
Utility
US 4,513,449 · App. 06/495,753
Shock absorbing athletic equipment
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: May 18, 1983
Inventor
Byron A. Donzis
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.