Granted Patent
Utility
US 5,847,490 · App. 08/879,127
Piezoelectric transformer wrapped by wrapping member of soft insulating sheet material
Inventors:
Katsunori Kumasaka, Masafumi KATSUNO, Koichi Okamoto, Yoshiaki Fuda
Patented Case
View Patent ↗
Granted: Dec 8, 1998
Filed: Jun 19, 1997
Inventors
Katsunori Kumasaka
Masafumi KATSUNO
Koichi Okamoto
Yoshiaki Fuda
Assignee (at issue)
TOKIN 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.