Granted Patent
Utility
US 6,550,816 · App. 10/055,079
Grout vent for a tendon-receiving duct
Inventor:
Felix L. Sorkin
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Jan 25, 2002
Inventor
Felix L. Sorkin
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.