Granted Patent
Utility
US 6,694,690 · App. 09/902,054
Concrete constructions employing the use of a ductile strip
Inventors:
Victor C. Li, Jun Zhang
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Jul 10, 2001
Inventors
Victor C. Li
Jun Zhang
Assignee (at issue)
THE REGENTS OF THE UNIVERSITY OF MICHIGAN
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.