Granted Patent
Utility
US 6,235,420 · App. 09/457,831
Hot swappable battery holder
Inventor:
Richard Ng
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Dec 9, 1999
Inventor
Richard Ng
Assignee (at issue)
Xybernaut Corp.
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.