Granted Patent
Utility
US 6,513,167 · App. 10/219,307
Headband assembly
Inventor:
Chen-An Cheng
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Aug 16, 2002
Inventor
Chen-An Cheng
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.