Granted Patent
Utility
US 6,833,780 · App. 10/741,667
Mechanical translator with ultra low friction ferrofluid bearings
Inventor:
Jeffrey T. Cheung
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Dec 19, 2003
Inventor
Jeffrey T. Cheung
Assignee (at issue)
Rockwell Scientific Licensing LLC
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.