Granted Patent
Utility
US 5,642,963 · App. 08/519,046
Spillway gate system
Inventor:
Henry K. Obermeyer
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Aug 24, 1995
Inventor
Henry K. Obermeyer
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.