Granted Patent
Utility
US 4,421,060 · App. 06/304,843
Nipple waterer
Inventors:
Don R. Frush, Keith Coffman
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Sep 23, 1981
Inventors
Don R. Frush
Keith Coffman
Assignee (at issue)
Chore-Time Equipment, 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.