Granted Patent
Utility
US 4,239,118 · App. 05/874,780
Sorting apparatus having automatic nulling arrangement
Inventor:
James F. Lockett
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Feb 3, 1978
Inventor
James F. Lockett
Assignee (at issue)
Geosource, 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.