Granted Patent
Utility
US 4,486,901 · App. 06/478,681
Multi-layered, open-celled foam shock absorbing structure for athletic equipment
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: Mar 25, 1983
Inventor
Byron A. Donzis
Assignee (at issue)
Houston Protective Equipment, Inc.
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.