Granted Patent
Utility
US 6,820,561 · App. 10/022,246
Sorting system for transferring items from a trolley to an unloading station in response to the detection of a magnetic field generated at the unloading station
Inventors:
Attilio Soldavini, Guiseppe Di Giovanni
Patented Case
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Granted: Nov 23, 2004
Filed: Dec 20, 2001
Inventors
Attilio Soldavini
Guiseppe Di Giovanni
Assignee (at issue)
SANDVIK AB
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.