Granted Patent
Utility
US 6,742,322 · App. 10/120,349
Portable plastic film wrapping system
Inventor:
Zhang Qicang
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Apr 12, 2002
Inventor
Zhang Qicang
Assignee (at issue)
ILLINOIS TOOL WORKS 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.