Granted Patent
Utility
US 6,563,145 · App. 09/474,624
Methods and apparatus for a composite collector double heterojunction bipolar transistor
Inventors:
Charles E. Chang, Richard L. Pierson, Jr., Peter J. Zampardi, Jr., Peter M. Asbeck
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Dec 29, 1999
Inventors
Charles E. Chang
Richard L. Pierson, Jr.
Peter J. Zampardi, Jr.
Peter M. Asbeck
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.