Granted Patent
Utility
US 5,638,612 · App. 08/684,509
Impact absorbing system for footwear
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Jul 19, 1996
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.