Granted Patent
Utility
US 5,437,244 · App. 07/760,154
Ball float for a watering tank
Inventor:
Carl W. Van Gilst
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Sep 16, 1991
Inventor
Carl W. Van Gilst
Assignee (at issue)
Agri-Engineering, Inc.
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.