Granted Patent
Utility
US 5,592,889 · App. 08/459,773
Multi compartment air seeder
Inventor:
Gerard Bourgault
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Jun 2, 1995
Inventor
Gerard Bourgault
Assignee (at issue)
Bourgault Industries Ltd.
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.