Granted Patent
Utility
US 4,885,985 · App. 07/170,902
Self regulating grain bin wall air system and method
Inventor:
Eugene B. Pollock
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Mar 21, 1988
Inventor
Eugene B. Pollock
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.