Granted Patent
Utility
US 5,216,557 · App. 07/883,478
Disk storage device having a brushless DC drive motor
Inventors:
Dieter Elsaesser, Johann von der Heide
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: May 15, 1992
Inventors
Dieter Elsaesser
Johann von der Heide
Assignee (at issue)
Papst Motoren 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.