Granted Patent
Utility
US 4,629,919 · App. 06/456,525
Direct drive motor
Inventor:
Alfred Merkle
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Jan 7, 1983
Inventor
Alfred Merkle
Assignee (at issue)
Papst Motoren
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.