Granted Patent
Utility
US 6,759,697 · App. 10/461,364
Heterojunction bipolar transistor
Inventors:
Kenji Toyoda, Koichiro Yuki, Takeshi Takagi, Teruhito Ohnishi, Minoru Kubo
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Jun 16, 2003
Inventors
Kenji Toyoda
Koichiro Yuki
Takeshi Takagi
Teruhito Ohnishi
Minoru Kubo
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.