Granted Patent
Utility
US 6,375,258 · App. 09/506,109
Portable workstool
Inventor:
Liping Fang
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Feb 17, 2000
Inventor
Liping Fang
Assignee (at issue)
Olympia Group, 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.