Granted Patent
Utility
US 6,688,423 · App. 09/833,177
Fluid-borne noise suppression
Inventors:
James Beatty, Michael Demchak
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Apr 11, 2001
Inventors
James Beatty
Michael Demchak
Assignee (at issue)
DANA LIMITED
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.