Granted Patent
Utility
US 5,276,376 · App. 07/895,624
Variable frequency ultrasonic generator with constant power output
Inventor:
Peter J. Puskas
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Jun 9, 1992
Inventor
Peter J. Puskas
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.