Granted Patent
Utility
US 6,557,186 · App. 10/112,777
Lightweight protective ear guard
Inventor:
John Purnell
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Apr 2, 2002
Inventor
John Purnell
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.