Granted Patent
Utility
US 6,684,681 · App. 10/236,705
Mechanical ultrasonic and high frequency sonic device
Inventor:
Paul J. Zombo
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Sep 6, 2002
Inventor
Paul J. Zombo
Assignee (at issue)
Siemens Westinghouse Power Corporation
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.