Granted Patent
Utility
US 5,799,598 · App. 08/700,222
Apparatus for sealing a vacuum chamber of a seed metering apparatus
Inventors:
John F. Stufflebeam, Thomas A. Olson, Lisle J. Dunham
Patented Case
View Patent ↗
Granted: Sep 1, 1998
Filed: Aug 20, 1996
Inventors
John F. Stufflebeam
Thomas A. Olson
Lisle J. Dunham
Assignee (at issue)
Case GmbH
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.