Granted Patent
Utility
US 4,408,346 · App. 06/301,660
Key assembly
Inventor:
Karl-Heinz Bauer
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Sep 14, 1981
Inventor
Karl-Heinz Bauer
Assignee (at issue)
Preh, Elektrofeinmechanische Werke Jakob Preh, Nachf. GmbH & Co.
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.