Granted Patent
Utility
US 4,920,292 · App. 07/090,743
Motor having rotor capable of both stepped rotary and axial shift motions
Inventors:
Klaus Albrecht, Helmut Hans, Johann von der Heide, Fritz Schmider
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Aug 28, 1987
Inventors
Klaus Albrecht
Helmut Hans
Johann von der Heide
Fritz Schmider
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.