Granted Patent
Utility
US 6,082,386 · App. 09/207,183
Vertically stacked collapsible structures
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: Jul 4, 2000
Filed: Dec 9, 1998
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.