Granted Patent
Utility
US 5,681,221 · App. 08/534,394
Torsional vibration damper
Inventors:
Albert Albers, Jürgen Pfeiffer
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Sep 27, 1995
Inventors
Albert Albers
Jürgen Pfeiffer
Assignee (at issue)
LUK Lamellen Und Kupplungsbau
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.