Granted Patent
Utility
US 5,500,142 · App. 08/334,123
Piezoelectric ceramics
Inventors:
Yoshihisa Ushida, Hiroshi Mase
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Nov 4, 1994
Inventors
Yoshihisa Ushida
Hiroshi Mase
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.