Granted Patent
Utility
US 6,736,152 · App. 10/307,831
Collapsible panels having multiple frame members
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Dec 2, 2002
Inventor
Yu Zheng
Assignee (at issue)
Patent Category 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.