Granted Patent
Utility
US 4,986,393 · App. 07/308,435
Adjustable vibration dampers for motor vehicles
Inventors:
Alfred Preukschat, Norbert Ackermann
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Feb 8, 1989
Inventors
Alfred Preukschat
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.