Granted Patent
Utility
US 6,571,410 · App. 10/174,876
Collapsible assembly
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Jun 18, 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.