Granted Patent
Utility
US 4,151,447 · App. 05/855,282
Linear motor
Inventors:
Johann von der Heide, Georg Papst
Patented Case
View Patent ↗
Granted: Apr 24, 1979
Filed: Nov 28, 1977
Inventors
Johann von der Heide
Georg Papst
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.