Granted Patent
Utility
US 6,175,218 · App. 09/320,298
Power factor correction (PFC) controller
Inventors:
Nak-Choon Choi, Kyung-Hee Jang, Maeng-Ho Seo
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: May 26, 1999
Inventors
Nak-Choon Choi
Kyung-Hee Jang
Maeng-Ho Seo
Assignee (at issue)
Fairchild Korea Semiconductor 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.