Granted Patent
Utility
US 5,274,313 · App. 07/681,511
Method and arrangement for actuating electromechanical transducers
Inventor:
Wolfgang Amrhein
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Aug 15, 1991
Inventor
Wolfgang Amrhein
Assignee (at issue)
Papst Licensing 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.