Granted Patent
Utility
US 5,680,989 · App. 08/514,625
Adjustable weir for liquid distribution systems
Inventors:
Richard F. Plachy, Norman W. Gavin
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Aug 14, 1995
Inventors
Richard F. Plachy
Norman W. Gavin
Assignee (at issue)
Norman F. 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.