Granted Patent
Utility
US 4,905,546 · App. 07/311,408
Twist-proof mechanical connecting assembly
Inventors:
Erich Katscher, Siegfried Forner, Alexander Hummeler, Gunter Rabe, Harald Hegenberger
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Feb 13, 1989
Inventors
Erich Katscher
Siegfried Forner
Alexander Hummeler
Gunter Rabe
Harald Hegenberger
Assignee (at issue)
Siemens Aktiengesellschaft
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.