Granted Patent
Utility
US 4,625,137 · App. 06/678,482
Piezoelectric actuator using bimorph element
Inventor:
Akira Tomono
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Dec 5, 1984
Inventor
Akira Tomono
Assignee (at issue)
Nippon Telegraph and Telephone Public 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.