Granted Patent
Utility
US 5,213,147 · App. 07/803,331
Method and apparatus for folding and collapsing objects supported by flexible loops
Inventor:
Yu Zheng
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Dec 4, 1993
Inventor
Yu Zheng
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.