Granted Patent
Utility
US 4,535,373 · App. 06/335,483
Labyrinth seal in disk storage drive
Inventor:
Bernhard Schuh
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Dec 29, 1981
Inventor
Bernhard Schuh
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.