Granted Patent
Utility
US 5,626,220 · App. 08/406,962
Bucket conveyor
Inventors:
Otto E. Rieger, Hans Dalferth, Zvonimir Bogdan, Hartwig Zenker
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Mar 28, 1995
Inventors
Otto E. Rieger
Hans Dalferth
Zvonimir Bogdan
Hartwig Zenker
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.