Granted Patent
Utility
US 4,281,987 · App. 06/113,983
Ultrasonically driven low-speed rotary motor
Inventor:
Claus Kleesattel
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Jan 21, 1980
Inventor
Claus Kleesattel
Assignee (at issue)
Cavitron, 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.