Granted Patent
Utility
US 6,686,613 · App. 10/383,515
Punch through type power device
Inventors:
Tomoko Matsudai, Hidetaka Hattori, Akio Nakagawa
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Mar 10, 2003
Inventors
Tomoko Matsudai
Hidetaka Hattori
Akio Nakagawa
Assignee (at issue)
Kabushiki Kaisha Toshiba
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.