Granted Patent
Utility
US 6,304,662 · App. 09/004,090
Sonic emitter with foam stator
Inventors:
Elwood G. Norris, James J. Croft, III
Patented Case
View Patent ↗
Granted: Oct 16, 2001
Filed: Jan 7, 1998
Inventors
Elwood G. Norris
James J. Croft, III
Assignee (at issue)
American Technology 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.