Granted Patent
Utility
US 4,401,057 · App. 06/308,949
Hog feeder
Inventor:
Carl W. Van Gilst
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Oct 5, 1981
Inventor
Carl W. Van Gilst
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.