Granted Patent
Utility
US 5,311,839 · App. 07/991,383
Poultry feeder
Inventors:
Eugene B. Pollock, Jeffrey L. Knollenberg
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Dec 15, 1992
Inventors
Eugene B. Pollock
Jeffrey L. Knollenberg
Assignee (at issue)
Grain Systems, 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.