Granted Patent
Utility
US 6,648,304 · App. 10/087,258
Modular fence
Inventor:
Alan Qing-Lin Zhu
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Mar 1, 2002
Inventor
Alan Qing-Lin Zhu
Assignee (at issue)
XCEL Distribution, 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.