Granted Patent
Utility
US 6,401,579 · App. 09/253,636
Work holding apparatus
Inventor:
Xun Lei
Patented Case
View Patent ↗
Granted: Jun 11, 2002
Filed: Feb 19, 1999
Inventor
Xun Lei
Assignee (at issue)
Delta International Machinery 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.