Granted Patent
Utility
US 5,895,997 · App. 08/840,544
Frequency modulated ultrasonic generator
Inventors:
Peter J. Puskas, David Arata
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: Apr 22, 1997
Inventors
Peter J. Puskas
David Arata
Assignee (at issue)
Ultrasonic 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.