Granted Patent
Utility
US 6,220,011 · App. 09/526,107
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Inventors:
Hans Dalferth, Zvonimir Bogdan, Hans-Jurgen Scherle, Alfred Puppel
Patented Case
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Granted: Apr 24, 2001
Filed: Mar 15, 2000
Inventors
Hans Dalferth
Zvonimir Bogdan
Hans-Jurgen Scherle
Alfred Puppel
Assignee (at issue)
RUD-Kettenfabrik Rieger & Dietz GmbH u. Co.
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.