Granted Patent
Utility
US 5,857,296 · App. 08/857,641
Concrete sandwich panel erection anchor
Inventors:
David A. Niday, Roy L. Edgar
Patented Case
View Patent ↗
Granted: Jan 12, 1999
Filed: May 16, 1997
Inventors
David A. Niday
Roy L. Edgar
Assignee (at issue)
DAYTON SUPERIOR CORPORATION
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.