Granted Patent
Utility
US 6,648,619 · App. 10/397,024
Vacuum pump
Inventor:
Dieter Otto
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Mar 25, 2003
Inventor
Dieter Otto
Assignee (at issue)
Luk, Automobiletechnik, 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.