Granted Patent
Utility
US 5,701,049 · App. 08/581,425
Piezoelectric transformer
Inventors:
Kouichi Kanayama, Nobuhiro Maruko
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: Dec 29, 1995
Inventors
Kouichi Kanayama
Nobuhiro Maruko
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.