Granted Patent
Utility
US 6,243,532 · App. 08/860,678
Rotational speed control device for an electric motor
Inventors:
Heinrich Wacker, Edwin Steiert
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Jun 6, 1997
Inventors
Heinrich Wacker
Edwin Steiert
Assignee (at issue)
J. Eberspaecher GmbH & Co. KG
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.