Granted Patent
Utility
US 6,006,772 · App. 08/995,656
Collapsible containers
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Dec 22, 1997
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.