Granted Patent
Utility
US 4,633,108 · App. 06/757,919
Direct current linear motor
Inventor:
Johann von der Heide
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Jul 22, 1985
Inventor
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.