Granted Patent
Utility
US 5,576,590 · App. 08/348,925
Piezoelectric ceramic transformer
Inventors:
Osamu Ohnishi, Takeshi Inoue
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Nov 25, 1994
Inventors
Osamu Ohnishi
Takeshi Inoue
Assignee (at issue)
NEC 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.