Granted Patent
Utility
US 4,880,086 · App. 07/202,979
Adjustable vibration damper
Inventors:
Heinz Knecht, Norbert Ackermann
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jun 6, 1988
Inventors
Heinz Knecht
Norbert Ackermann
Assignee (at issue)
Boge GmbH
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.