Granted Patent
Utility
US 5,666,768 · App. 08/581,286
Collapsible handle assembly for concrete covers
Inventor:
Norman W. Gavin
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Dec 29, 1995
Inventor
Norman W. Gavin
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.