Granted Patent
Utility
US 4,239,434 · App. 06/028,570
Weight coded delivery conveyor system
Inventor:
Donald N. Gannon
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Apr 9, 1979
Inventor
Donald N. Gannon
Assignee (at issue)
The Boeing Company
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.