Granted Patent
Utility
US 6,495,947 · App. 09/723,672
Piezoelectric ceramic composition, and high power output transformer made of the same composition
Inventors:
Jong Sun Kim, Choong Sik Yoo, Joo Hyun Yoo, Yong-Woo Lee
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: Dec 5, 2000
Inventors
Jong Sun Kim
Choong Sik Yoo
Joo Hyun Yoo
Yong-Woo Lee
Assignee (at issue)
SAMSUNG DISPLAY CO., 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.