Granted Patent
Utility
US 6,239,535 · App. 09/281,398
Omni-directional ultrasonic transducer apparatus having controlled frequency response
Inventors:
Minoru Toda, Kyung-Tae Park, Susan Huang Zaks, Jeffrey Swan
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Mar 30, 1999
Inventors
Minoru Toda
Kyung-Tae Park
Susan Huang Zaks
Jeffrey Swan
Assignee (at issue)
MEASUREMENT SPECIALTIES, INC.
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.