Granted Patent
Utility
US 6,680,144 · App. 10/140,033
Battery separator
Inventor:
Wai Ming Choi
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: May 6, 2002
Inventor
Wai Ming Choi
Assignee (at issue)
KVG Technologies, 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.