Granted Patent
Utility
US 5,043,621 · App. 07/414,059
Piezoelectric actuator
Inventor:
Gordon W. Culp
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Sep 28, 1989
Inventor
Gordon W. Culp
Assignee (at issue)
Rockwell International 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.