Granted Patent
Utility
US 5,533,938 · App. 08/449,230
Pocket chain wheel
Inventor:
Hans Dalferth
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: May 24, 1995
Inventor
Hans Dalferth
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.